>1fx7B (B:) observed residues (from ATOM records)
mnelvdttemylrtiydleeegvtplrariaerldqsgptvsqtvsrmerdgllrvagdr
hleltekgralaiavmrkhrlaerllvdviglpweevhaeacrwehvmsedverrlvkvl
nnpttspfgnpipgldelgvlvrltelpagspvavvvrqltehvqgdidlitrlkdagvv
pnarvtvettpgggvtivipghenvtlphemahavkvekv