Chains and heterogens:
PDB Chain Sequences:
>1abrA (A:) edrpikfstegatsqsykqfiealrerlrgglihdipvlpdpttlqernryitvelsnsd tesievgidvtnayvvayragtqsyflrdapssasdylftgtdqhslpfygtygdlerwa hqsrqqiplglqalthgisffrsggndneekartliviiqmvaeaarfryisnrvrvsiq tgtafqpdaamislennwdnlsrgvqesvqdtfpnqvtltnirnepvivdslshptvavl almlfvcnppn
>1abrB (B:) ivekskicssryeptvriggrdgmcvdvydngyhngnriimwkckdrleenqlwtlksdk tirsngkclttygyapgsyvmiydctsavaeatyweiwdngtiinpksalvlsaesssmg gtltvqtneylmrqgwrtgnntspfvtsisgysdlcmqaqgsnvwmadcdsnkkeqqwal ytdgsirsvqntnncltskdhkqgstillmgcsngwasqrwvfkndgsiyslyddmvmdv kgsdpslkqiilwpytgkpnqiwltlf