1Y92:
reference: The role of the hinge loop in domain swapping. The special case of bovine seminal ribonuclease., Picone D, Di Fiore A, Ercole C, Franzese M, Sica F, Tomaselli S, Mazzarella L, J Biol Chem 2005 Apr 8;280(14):13771-8. Epub 2005 Jan 12. PMID: 15647261

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