1ZVH:
reference: Molecular basis for the preferential cleft recognition by dromedary heavy-chain antibodies., De Genst E, Silence K, Decanniere K, Conrath K, Loris R, Kinne J, Muyldermans S, Wyns L, Proc Natl Acad Sci U S A. 2006 Mar 21;103(12):4586-91. Epub 2006 Mar 13. PMID: 16537393

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