>8u4s_B mol:protein length:240 REGN7663 Fab heavy chain
QVQLVQSGAEVKKPGASVKVSCKASGYTFTSYGISWVRQAPGQGIEWMGWISTYNGNRNYAQKVQGRVTMTTDRSTSTAYMDLRSLRSDDTAVYYCARHGITGARNYYYHYGMDVWGQGTTVTVSSASTKGPSVFPLAPCSRSTSESTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTKTYTCNVDHKPSNTKVDKRVESKYGPPCPPCPAPPV