>5y4aB (B:) observed residues (from ATOM records)
vsasktaqqlkyikdsiktipdypilfrdvtsllenpkaysasiellsehysesgvtkvv
gteargflfgapvalalgvgfvpvrkpgklpretisesyeltdtleihtdsiqpgdkvlv
vddllatggtieatvklirrlggevvhaafiinlpelggearltqqgihcyslvsfdg