>5b1xB (B:) SEQRES residues gscpknwksfssncyfistesaswqdsekdcarmeahllvintqeeqdfifqnlqeesay fvglsdpegqrhwqwvdqtpynesstfwhprepsdpnercvvlnfrkspkrwgwndvncl gpqrsvcemmkihl