Chains and heterogens:
PDB Chain Sequences:
>1nrgA (A:) eethltsldpvkqfaawfeeavqcpdigeanamclatctrdgkpsarmlllkgfgkdgfr fftnfesrkgkeldsnpfaslvfyweplnrqvrvegpvkklpeeeaecyfhsrpkssqig avvshqssvipdreylrkkneeleqlyqdqevpkpkswggyvlypqvmefwqgqtnrlhd rivfrrglptgdsplgpmthrgeedwlyerlap