>1nt2B (B:) observed residues (from ATOM records)
lrynlwfgvydgkeiklsenfeesflkaenpsplpfnvsevgakalgkdyyrilrktala
vsekmvekelrredryvvalvkaleeidesinmlneklediravkeseitekfekkirel
relrrdvereieevmekiapnmtelvgakvaaklleragsmerlvrlpaskiqvigaehg
iiflhpfirtlpkakrgkmarflaaklaiaakidyfrgeideslyesirrryeelr