2GFB:
reference: Crystal structure of a catalytic antibody Fab with esterase-like activity., Golinelli-Pimpaneau B, Gigant B, Bizebard T, Navaza J, Saludjian P, Zemel R, Tawfik DS, Eshhar Z, Green BS, Knossow M, Structure 1994 Mar 15;2(3):175-83. PMID: 8069632

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