>d1deeb1 b.1.1.1 (B:501-621) Immunoglobulin (variable domains of L and H chains) {Fab of human IgM RF 2A2} qvqlvesgggvvqpgkslrlscaasgftfsgygmhwvrqapgkglewvalisydesnkyy adsvkgrftisrdnskntlylqmnslraedtavyycakvkfydptapndywgqgtlvtvs s