Chains and heterogens:
PDB Chain Sequences:
>1zviA (A:) gprflkvknwetdvvltdtlhlkstletgctehicmgsimlpsqhtrkpedvrtkdqlfp lakefldqyyssikrfgskahmdrleevnkeieststyqlkdteliygakhawrnasrcv griqwsklqvfdardcttahgmfnyicnhvkyatnkgnlrsaitifpqrtdgkhdfrvwn sqliryagykqpdgstlgdpanvqfteiciqqgwkaprgrfdvlplllqangndpelfqi ppelvlevpirhpkfdwfkdlglkwyglpavsnmlleigglefsacpfsgwymgteigvr dycdnsrynileevakkmdldmrktsslwkdqalveiniavlysfqsdkvtivdhhsate sfikhmeneyrcrggcpadwvwivppmsgsitpvfhqemlnyrltpsfeyqpdpwnthvw
>1zviA (A:) gprflkvknwetdvvltdtlhlkstletgctehicmgsimlptrkpedvrtkdqlfplak efldqyyssikrfgskahmdrleevnkeieststyqlkdteliygakhawrnasrcvgri qwsklqvfdardcttahgmfnyicnhvkyatnkgnlrsaitifpqrtdgkhdfrvwnsql iryagykqpdgstlgdpanvqfteiciqqgwkaprgrfdvlplllqangndpelfqippe lvlevpirhpkfdwfkdlglkwyglpavsnmlleigglefsacpfsgwymgteigvrdyc dnsrynileevakkmdldmrktsslwkdqalveiniavlysfqsdkvtivdhhsatesfi khmeneyrcrggcpadwvwivppmsgsitpvfhqemlnyrltpsfeyqpdpwnthvw