1NT2:
reference: Structure and function of archaeal box C/D sRNP core proteins., Aittaleb M, Rashid R, Chen Q, Palmer JR, Daniels CJ, Li H, Nat Struct Biol 2003 Apr;10(4):256-63. PMID: 12598892

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).