Chains and heterogens:
PDB Chain Sequences:
>2gsq_ (-) pkytlhyfplmgraelcrfvlaahgeeftdrvvemadwpnlkatmysnampvldidgtkm sqsmciarhlarefgldgktslekyrvdeitetlqdifndvvkikfapeaakeavqqnye ksckrlapflegllvsngggdgffvgnsmtladlhcyvalevplkhtpellkdcpkival rkrvaecpkiaaylkkrpvrdf