>4tthB (B:) observed residues (from ATOM records)
cvaeigekvfkardlkngrfvalkrvrvegmplstirevavlrhletfehpnvvrlfdvc
ttkltlvfehvdqdlttyldkvpepgvptetikdmmfqllrgldflhshrvvhrdlkpqn
ilvtssgqikladfglariysfqmaltsvvvtlwyrapevllqssyatpvdlwsvgcifa
emfrrkplfrgssdvdqlgkildviglpgeedwppiekfdidelgkdlllkcltfnpakr
isaysalshpyfqdle