Chains and heterogens:
PDB Chain Sequences:
>1gsq_ (-) pkytlhyfplmgraelcrfvlaahgeeftdrvvemadwpnlkatmysnampvldidgtkm sqsmciarhlarefgldgktslekyrvdeitetlqdifndvvkikfapeaakeavqqnye ksckrlapflegllvsngggdgffvgnsmtladlhcyvalevplkhtpellkdcpkival rkrvaecpkiaaylkkrpvrdf