>3u51B (B:) observed residues (from ATOM records)
eipreslrlevklgqgcfgevwmgtwngttrvaiktlkpgtmspeaflqeaqvmkklrhe
klvqlyavvseepiyivteymskgslldflkgemgkylrlpqlvdmaaqiasgmayverm
nyvhrdlraanilvgenlvckvadfgpikwtapeaalygrftiksdvwsfgilltelttk
grvpypgmvnrevldqvergyrmpcppecpeslhdlmcqcwrkdpeerptfeylqafled
yftstepqyqpgenl