>1a3gA (A:) observed residues (from ATOM records)
kadyiwfngemvrwedakvhvmshalhygtsvfegircydshkgpvvfrhrehmqrlhds
akiyrfpvsqsidelmeacrdvirknnltsayirplifvgdvgmgvnppagystdviiaa
fpwqgidamvsswnraapntiptaakaggnylssllvgsearrhgyqegialdvngyise
gagenlfevkdgvlftppftssalpgitrdaiiklakelgievreqvlsreslyladevf
msgtaaeitpvrsvdgiqvgegrcgpvtkriqqaffglftgetedkwgwldqvnq