6FAB:
reference: Three-dimensional structure of murine anti-p-azophenylarsonate Fab 36-71. 1. X-ray crystallography, site-directed mutagenesis, and modeling of the complex with hapten., Strong RK, Campbell R, Rose DR, Petsko GA, Sharon J, Margolies MN, Biochemistry 1991 Apr 16;30(15):3739-48. PMID: 2015229

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