>4xx1_H mol:protein length:238 Fab1 heavy chain QVQLVESGGGVVQPGRSLRLSCAASGFTFSSYGMHWVRQAPGKGLEWVAVIWYDGSNKF YEDSVKGRFTISRDNSKNTLYLQMDSLRAEDTAVYYCAREGAAVRSFYYSYYGMDVWGQ GTTVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVH TFPAVLQSSGLYSHSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCAAAENLY FQ