>4gk1A (A:) observed residues (from ATOM records)
sgfvcntcpekwinfqrkcyyfgkgtkqwvharyacddmegqlvsihspeeqdfltkhas
htgswiglrnldlkgefiwvdgshvdysnwapgeptsrsqgedcvmmrgsgrwnaafcdr
klgawvcdrlatct