Analysis of interatomic Contacts of Structural Units in PDB entry:
2AK4

Contacts of Structural Units (CSU) are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332).
This page provides analyses of contacts formed by:

chains
helices
sheets
residues

For analysis of ligand-protein contacts, use:

LPC software

3D structure can be seen in additional window with STING software for 2AK4 entry

There are 20 chains in PDB entry 2AK4 (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	GLY 1	PRO 276
B	ILE 1	MET 99
C	LEU 1	TYR 13
D	GLN 1	SER 206
E	GLY 3	ASP 247
F	GLY 1	PRO 276
G	ILE 1	MET 99
H	LEU 1	TYR 13
I	GLN 1	SER 206
J	GLY 3	ASP 247
K	GLY 1	PRO 276
L	ILE 1	MET 99
M	LEU 1	TYR 13
N	GLN 1	SER 206
P	GLY 3	ASP 247
Q	GLY 1	PRO 276
R	ILE 1	MET 99
S	LEU 1	TYR 13
T	GLN 1	SER 206
U	GLY 3	ASP 247

There are 56 helices in PDB entry 2AK4. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	49	53	Right-handed 310
Helix 2	2	A	56	85	Right-handed alpha
Helix 3	3	A	137	150	Right-handed alpha
Helix 4	4	A	151	162	Right-handed alpha
Helix 5	5	A	162	175	Right-handed alpha
Helix 6	6	A	175	180	Right-handed alpha
Helix 7	7	A	225	228	Right-handed 310
Helix 8	8	A	253	255	Right-handed 310
Helix 9	9	D	81	85	Right-handed 310
Helix 10	10	D	169	172	Right-handed 310
Helix 11	11	E	83	87	Right-handed 310
Helix 12	12	E	119	123	Right-handed 310
Helix 13	13	E	134	142	Right-handed alpha
Helix 14	14	E	201	205	Right-handed alpha
Helix 15	15	F	49	53	Right-handed 310
Helix 16	16	F	56	85	Right-handed alpha
Helix 17	17	F	137	150	Right-handed alpha
Helix 18	18	F	151	162	Right-handed alpha
Helix 19	19	F	162	175	Right-handed alpha
Helix 20	20	F	175	180	Right-handed alpha
Helix 21	21	F	225	228	Right-handed 310
Helix 22	22	F	253	255	Right-handed 310
Helix 23	23	I	81	85	Right-handed 310
Helix 24	24	I	169	172	Right-handed 310
Helix 25	25	J	83	87	Right-handed 310
Helix 26	26	J	119	123	Right-handed 310
Helix 27	27	J	134	142	Right-handed alpha
Helix 28	28	J	201	205	Right-handed alpha
Helix 29	29	K	49	53	Right-handed 310
Helix 30	30	K	56	85	Right-handed alpha
Helix 31	31	K	137	150	Right-handed alpha
Helix 32	32	K	151	162	Right-handed alpha
Helix 33	33	K	162	175	Right-handed alpha
Helix 34	34	K	175	180	Right-handed alpha
Helix 35	35	K	225	228	Right-handed 310
Helix 36	36	K	253	255	Right-handed 310
Helix 37	37	N	81	85	Right-handed 310
Helix 38	38	N	169	172	Right-handed 310
Helix 39	39	P	83	87	Right-handed 310
Helix 40	40	P	119	123	Right-handed 310
Helix 41	41	P	134	142	Right-handed alpha
Helix 42	42	P	201	205	Right-handed alpha
Helix 43	43	Q	49	53	Right-handed 310
Helix 44	44	Q	56	85	Right-handed alpha
Helix 45	45	Q	137	150	Right-handed alpha
Helix 46	46	Q	151	162	Right-handed alpha
Helix 47	47	Q	162	175	Right-handed alpha
Helix 48	48	Q	175	180	Right-handed alpha
Helix 49	49	Q	225	228	Right-handed 310
Helix 50	50	Q	253	255	Right-handed 310
Helix 51	51	T	81	85	Right-handed 310
Helix 52	52	T	169	172	Right-handed 310
Helix 53	53	U	83	87	Right-handed 310
Helix 54	54	U	119	123	Right-handed 310
Helix 55	55	U	134	142	Right-handed alpha
Helix 56	56	U	201	205	Right-handed alpha

There are 72 sheets in PDB entry 2AK4. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, AA, AB, AC, AD, AE, AF, AG, AH, AI, AJ, AK, AL, AM, AN, AO, AP, AQ, AR, AS, AT, AU, AV, AW, AX, AY, AZ, BA, BB, BC, BD, BE, BF, BG, BH, BI, BJ, BK, BL, BM, BN, BO, BP, BQ, BR, BS, BT,

There are 8 strands in A sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	46	47	first strand
Strand 2	A	31	37	anti-parallel
Strand 3	A	21	28	anti-parallel
Strand 4	A	4	12	anti-parallel
Strand 5	A	94	103	anti-parallel
Strand 6	A	109	118	anti-parallel
Strand 7	A	121	126	anti-parallel
Strand 8	A	133	135	anti-parallel

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There are 4 strands in B sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	186	193	first strand
Strand 2	A	198	208	anti-parallel
Strand 3	A	241	250	anti-parallel
Strand 4	A	229	230	anti-parallel

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There are 4 strands in C sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	186	193	first strand
Strand 2	A	198	208	anti-parallel
Strand 3	A	241	250	anti-parallel
Strand 4	A	234	235	anti-parallel

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There are 4 strands in D sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	222	223	first strand
Strand 2	A	214	219	anti-parallel
Strand 3	A	257	262	anti-parallel
Strand 4	A	270	272	anti-parallel

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There are 4 strands in E sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	6	11	first strand
Strand 2	B	21	30	anti-parallel
Strand 3	B	62	70	anti-parallel
Strand 4	B	50	51	anti-parallel

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There are 4 strands in F sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	6	11	first strand
Strand 2	B	21	30	anti-parallel
Strand 3	B	62	70	anti-parallel
Strand 4	B	55	56	anti-parallel

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There are 4 strands in G sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	44	45	first strand
Strand 2	B	36	41	anti-parallel
Strand 3	B	78	83	anti-parallel
Strand 4	B	91	94	anti-parallel

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There are 2 strands in H sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	2	4	first strand
Strand 2	D	23	25	anti-parallel

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There are 5 strands in I sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	9	13	first strand
Strand 2	D	110	115	parallel
Strand 3	D	86	93	anti-parallel
Strand 4	D	31	37	anti-parallel
Strand 5	D	44	50	anti-parallel

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There are 4 strands in J sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	9	13	first strand
Strand 2	D	110	115	parallel
Strand 3	D	86	93	anti-parallel
Strand 4	D	105	106	anti-parallel

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There are 4 strands in K sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	18	20	first strand
Strand 2	D	72	77	anti-parallel
Strand 3	D	62	67	anti-parallel
Strand 4	D	55	57	anti-parallel

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There are 4 strands in L sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	124	128	first strand
Strand 2	D	137	142	anti-parallel
Strand 3	D	173	182	anti-parallel
Strand 4	D	159	160	anti-parallel

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There are 4 strands in M sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	124	128	first strand
Strand 2	D	137	142	anti-parallel
Strand 3	D	173	182	anti-parallel
Strand 4	D	164	168	anti-parallel

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There are 4 strands in N sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	4	7	first strand
Strand 2	E	19	25	anti-parallel
Strand 3	E	76	79	anti-parallel
Strand 4	E	66	68	anti-parallel

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There are 6 strands in O sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	10	14	first strand
Strand 2	E	112	117	parallel
Strand 3	E	88	93	anti-parallel
Strand 4	E	32	38	anti-parallel
Strand 5	E	42	51	anti-parallel
Strand 6	E	54	57	anti-parallel

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There are 4 strands in P sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	127	131	first strand
Strand 2	E	143	153	anti-parallel
Strand 3	E	191	200	anti-parallel
Strand 4	E	173	175	anti-parallel

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There are 4 strands in Q sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	127	131	first strand
Strand 2	E	143	153	anti-parallel
Strand 3	E	191	200	anti-parallel
Strand 4	E	180	181	anti-parallel

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There are 4 strands in R sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	167	169	first strand
Strand 2	E	158	164	anti-parallel
Strand 3	E	210	217	anti-parallel
Strand 4	E	236	243	anti-parallel

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There are 8 strands in S sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	46	47	first strand
Strand 2	F	31	37	anti-parallel
Strand 3	F	21	28	anti-parallel
Strand 4	F	4	12	anti-parallel
Strand 5	F	94	103	anti-parallel
Strand 6	F	109	118	anti-parallel
Strand 7	F	121	126	anti-parallel
Strand 8	F	133	135	anti-parallel

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There are 4 strands in T sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	186	193	first strand
Strand 2	F	198	208	anti-parallel
Strand 3	F	241	250	anti-parallel
Strand 4	F	229	230	anti-parallel

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There are 4 strands in U sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	186	193	first strand
Strand 2	F	198	208	anti-parallel
Strand 3	F	241	250	anti-parallel
Strand 4	F	234	235	anti-parallel

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There are 4 strands in V sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	222	223	first strand
Strand 2	F	214	219	anti-parallel
Strand 3	F	257	262	anti-parallel
Strand 4	F	270	272	anti-parallel

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There are 4 strands in W sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	6	11	first strand
Strand 2	G	21	30	anti-parallel
Strand 3	G	62	70	anti-parallel
Strand 4	G	50	51	anti-parallel

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There are 4 strands in X sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	6	11	first strand
Strand 2	G	21	30	anti-parallel
Strand 3	G	62	70	anti-parallel
Strand 4	G	55	56	anti-parallel

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There are 4 strands in Y sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	44	45	first strand
Strand 2	G	36	41	anti-parallel
Strand 3	G	78	83	anti-parallel
Strand 4	G	91	94	anti-parallel

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There are 2 strands in Z sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	2	4	first strand
Strand 2	I	23	25	anti-parallel

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There are 5 strands in AA sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	9	13	first strand
Strand 2	I	110	115	parallel
Strand 3	I	86	93	anti-parallel
Strand 4	I	31	37	anti-parallel
Strand 5	I	44	50	anti-parallel

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There are 4 strands in AB sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	9	13	first strand
Strand 2	I	110	115	parallel
Strand 3	I	86	93	anti-parallel
Strand 4	I	105	106	anti-parallel

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There are 4 strands in AC sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	18	20	first strand
Strand 2	I	72	77	anti-parallel
Strand 3	I	62	67	anti-parallel
Strand 4	I	55	57	anti-parallel

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There are 4 strands in AD sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	124	128	first strand
Strand 2	I	138	142	anti-parallel
Strand 3	I	173	181	anti-parallel
Strand 4	I	159	160	anti-parallel

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There are 4 strands in AE sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	124	128	first strand
Strand 2	I	138	142	anti-parallel
Strand 3	I	173	181	anti-parallel
Strand 4	I	164	168	anti-parallel

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There are 4 strands in AF sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	4	7	first strand
Strand 2	J	19	25	anti-parallel
Strand 3	J	76	79	anti-parallel
Strand 4	J	66	68	anti-parallel

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There are 6 strands in AG sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	10	14	first strand
Strand 2	J	112	117	parallel
Strand 3	J	88	93	anti-parallel
Strand 4	J	32	38	anti-parallel
Strand 5	J	42	51	anti-parallel
Strand 6	J	54	57	anti-parallel

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There are 4 strands in AH sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	127	131	first strand
Strand 2	J	143	153	anti-parallel
Strand 3	J	191	200	anti-parallel
Strand 4	J	173	175	anti-parallel

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There are 4 strands in AI sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	127	131	first strand
Strand 2	J	143	153	anti-parallel
Strand 3	J	191	200	anti-parallel
Strand 4	J	180	181	anti-parallel

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There are 4 strands in AJ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	167	169	first strand
Strand 2	J	158	164	anti-parallel
Strand 3	J	210	217	anti-parallel
Strand 4	J	236	243	anti-parallel

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There are 8 strands in AK sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	46	47	first strand
Strand 2	K	31	37	anti-parallel
Strand 3	K	21	28	anti-parallel
Strand 4	K	3	12	anti-parallel
Strand 5	K	94	103	anti-parallel
Strand 6	K	109	118	anti-parallel
Strand 7	K	121	126	anti-parallel
Strand 8	K	133	135	anti-parallel

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There are 4 strands in AL sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	186	195	first strand
Strand 2	K	198	208	anti-parallel
Strand 3	K	241	250	anti-parallel
Strand 4	K	229	230	anti-parallel

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There are 4 strands in AM sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	186	195	first strand
Strand 2	K	198	208	anti-parallel
Strand 3	K	241	250	anti-parallel
Strand 4	K	234	235	anti-parallel

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There are 4 strands in AN sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	222	223	first strand
Strand 2	K	214	219	anti-parallel
Strand 3	K	257	262	anti-parallel
Strand 4	K	270	272	anti-parallel

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There are 4 strands in AO sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	6	11	first strand
Strand 2	L	21	30	anti-parallel
Strand 3	L	62	70	anti-parallel
Strand 4	L	50	51	anti-parallel

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There are 4 strands in AP sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	6	11	first strand
Strand 2	L	21	30	anti-parallel
Strand 3	L	62	70	anti-parallel
Strand 4	L	55	56	anti-parallel

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There are 4 strands in AQ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	44	45	first strand
Strand 2	L	36	41	anti-parallel
Strand 3	L	78	83	anti-parallel
Strand 4	L	91	94	anti-parallel

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There are 2 strands in AR sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	N	2	4	first strand
Strand 2	N	23	25	anti-parallel

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There are 5 strands in AS sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	N	9	13	first strand
Strand 2	N	110	115	parallel
Strand 3	N	86	93	anti-parallel
Strand 4	N	31	37	anti-parallel
Strand 5	N	44	50	anti-parallel

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There are 4 strands in AT sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	N	9	13	first strand
Strand 2	N	110	115	parallel
Strand 3	N	86	93	anti-parallel
Strand 4	N	105	106	anti-parallel

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There are 3 strands in AU sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	N	18	20	first strand
Strand 2	N	72	77	anti-parallel
Strand 3	N	62	67	anti-parallel

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There are 4 strands in AV sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	N	124	128	first strand
Strand 2	N	137	142	anti-parallel
Strand 3	N	173	182	anti-parallel
Strand 4	N	159	160	anti-parallel

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There are 4 strands in AW sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	N	124	128	first strand
Strand 2	N	137	142	anti-parallel
Strand 3	N	173	182	anti-parallel
Strand 4	N	164	168	anti-parallel

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There are 4 strands in AX sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	P	4	7	first strand
Strand 2	P	19	25	anti-parallel
Strand 3	P	74	79	anti-parallel
Strand 4	P	66	68	anti-parallel

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There are 6 strands in AY sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	P	10	14	first strand
Strand 2	P	112	117	parallel
Strand 3	P	88	93	anti-parallel
Strand 4	P	32	38	anti-parallel
Strand 5	P	42	51	anti-parallel
Strand 6	P	54	57	anti-parallel

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There are 4 strands in AZ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	P	127	131	first strand
Strand 2	P	143	153	anti-parallel
Strand 3	P	191	200	anti-parallel
Strand 4	P	173	175	anti-parallel

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There are 4 strands in BA sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	P	127	131	first strand
Strand 2	P	143	153	anti-parallel
Strand 3	P	191	200	anti-parallel
Strand 4	P	180	181	anti-parallel

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There are 4 strands in BB sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	P	167	169	first strand
Strand 2	P	158	164	anti-parallel
Strand 3	P	210	217	anti-parallel
Strand 4	P	236	243	anti-parallel

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There are 8 strands in BC sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	Q	46	47	first strand
Strand 2	Q	31	37	anti-parallel
Strand 3	Q	21	28	anti-parallel
Strand 4	Q	3	12	anti-parallel
Strand 5	Q	94	103	anti-parallel
Strand 6	Q	109	118	anti-parallel
Strand 7	Q	121	126	anti-parallel
Strand 8	Q	133	135	anti-parallel

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There are 4 strands in BD sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	Q	186	193	first strand
Strand 2	Q	198	208	anti-parallel
Strand 3	Q	241	250	anti-parallel
Strand 4	Q	229	230	anti-parallel

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There are 4 strands in BE sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	Q	186	193	first strand
Strand 2	Q	198	208	anti-parallel
Strand 3	Q	241	250	anti-parallel
Strand 4	Q	234	235	anti-parallel

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There are 4 strands in BF sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	Q	222	223	first strand
Strand 2	Q	214	219	anti-parallel
Strand 3	Q	257	262	anti-parallel
Strand 4	Q	270	273	anti-parallel

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There are 4 strands in BG sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	R	6	11	first strand
Strand 2	R	21	30	anti-parallel
Strand 3	R	62	70	anti-parallel
Strand 4	R	50	51	anti-parallel

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There are 4 strands in BH sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	R	6	11	first strand
Strand 2	R	21	30	anti-parallel
Strand 3	R	62	70	anti-parallel
Strand 4	R	55	56	anti-parallel

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There are 4 strands in BI sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	R	44	45	first strand
Strand 2	R	36	41	anti-parallel
Strand 3	R	78	83	anti-parallel
Strand 4	R	91	94	anti-parallel

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There are 2 strands in BJ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	T	2	4	first strand
Strand 2	T	23	25	anti-parallel

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There are 5 strands in BK sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	T	9	13	first strand
Strand 2	T	110	115	parallel
Strand 3	T	86	93	anti-parallel
Strand 4	T	31	37	anti-parallel
Strand 5	T	44	50	anti-parallel

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There are 4 strands in BL sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	T	9	13	first strand
Strand 2	T	110	115	parallel
Strand 3	T	86	93	anti-parallel
Strand 4	T	105	106	anti-parallel

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There are 4 strands in BM sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	T	18	20	first strand
Strand 2	T	72	77	anti-parallel
Strand 3	T	62	67	anti-parallel
Strand 4	T	56	57	anti-parallel

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There are 4 strands in BN sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	T	124	128	first strand
Strand 2	T	137	142	anti-parallel
Strand 3	T	173	182	anti-parallel
Strand 4	T	159	160	anti-parallel

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There are 4 strands in BO sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	T	124	128	first strand
Strand 2	T	137	142	anti-parallel
Strand 3	T	173	182	anti-parallel
Strand 4	T	164	168	anti-parallel

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There are 4 strands in BP sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	U	4	7	first strand
Strand 2	U	19	25	anti-parallel
Strand 3	U	76	79	anti-parallel
Strand 4	U	66	68	anti-parallel

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There are 6 strands in BQ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	U	10	14	first strand
Strand 2	U	112	117	parallel
Strand 3	U	88	93	anti-parallel
Strand 4	U	32	38	anti-parallel
Strand 5	U	42	49	anti-parallel
Strand 6	U	56	57	anti-parallel

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There are 4 strands in BR sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	U	127	131	first strand
Strand 2	U	143	153	anti-parallel
Strand 3	U	191	200	anti-parallel
Strand 4	U	173	175	anti-parallel

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There are 4 strands in BS sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	U	127	131	first strand
Strand 2	U	143	153	anti-parallel
Strand 3	U	191	200	anti-parallel
Strand 4	U	180	181	anti-parallel

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There are 4 strands in BT sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	U	167	169	first strand
Strand 2	U	158	164	anti-parallel
Strand 3	U	210	217	anti-parallel
Strand 4	U	236	243	anti-parallel

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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il

Analysis of interatomic Contacts of Structural Units in PDB entry: 2AK4

Analysis of interatomic Contacts of Structural Units in PDB entry:
2AK4