4z0x B 2.0 BS01 peptide C 0 I52 F55 M59 S102 G104 I39 F42 M46 S85 G87 27641232 435 ~ 446 GAEVKKPGSSVKVSCEANYVITWVRQAPGQGLEWMGGFIPDFRTAMYAQGFQGRVTITADLAYMELTNLRSEDTAVYYCARGPLSRGYYDYWGPGTLVTVS