1E2M: Hpt + Hmtt
reference: The effect of substrate binding on the conformation and structural stability of Herpes simplex virus type 1 thymidine kinase., Wurth C, Kessler U, Vogt J, Schulz GE, Folkers G, Scapozza L, Protein Sci 2001 Jan;10(1):63-73. PMID: 11266595

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