>1xs2A (A:) observed residues (from ATOM records)
rmfkieaaeivvarlplkthkvvpllilhgegvqgvaegtmearpmyreetiagaldllr
gtflpailgqtfanpeavsdalgsyrgnrmaramvemaawdlwartlgvplgtllgghke
qvevgvslgiqadeqatvdlvrrhveqgyrriklkikpgwdvqpvratreafpdirltvd
ansaytladagrlrqldeydltyieqplawddlvdhaelarrirtplcldesvasasdar
kalalgaggvinlkvarvgghaesrrvhdvaqsfgapvwcggmlesgigrahnihlstls
nfrlpgdtssasrywerdliqepleavdglmpvpqgpgtgvtldreflatvteaqeehra