>1a3gB (B:) observed residues (from ATOM records)
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akiyrfpvsqsidelmeacrdvirknnltsayirplifvgdvgmgvnppagystdviiaa
fpwqgidamvsswnraapntiptaakaggnylssllvgsearrhgyqegialdvngyise
gagenlfevkdgvlftppftssalpgitrdaiiklakelgievreqvlsreslyladevf
msgtaaeitpvrsvdgiqvgegrcgpvtkriqqaffglftgetedkwgwldqvnq