>4gk1G (G:) observed residues (from ATOM records)
cntcpekwinfqrkcyyfgkgtkqwvharyacddmegqlvsihspeeqdfltkhashtgs
wiglrnldlkgefiwvdgshvdysnwapgeptsrsqgedcvmmrgsgrwnaafcdrklga
wvcdrlatc