>2ff1B (B:) observed residues (from ATOM records)
saknvvldhdgnlddfvamvllasntekvrligalctdadcfvengfnvtgkimclmhnn
mnlplfpigksaatavnpfpkewrclaknmddmpilnipenvelwdkikaenekyegqql
ladlvmnseekvticvtgplsnvawcidkygekftskveecvimggavdvrgnvflpstd
gtaewniywdpasaktvfgcpglrrimfsldstntvpvrspyvqrfgeqtnfllsilvgt
mwamgyyawdaltaayvvdqkvanvdpvpidvvvdkqpnegatvrtdaenypltfvarnp
eaeffldmllrsarac