Chains and heterogens:
PDB Chain Sequences:
>1mzaA (A:) meiiggkevsphsrpfmasiqygghhvcggvlidpqwvltaahcqyrftkgqsptvvlga hslskneaskqtleikkfipfsrvtsdpqsndimlvklqtaaklnkhvkmlhirsktslr sgtkckvtgwgatdpdslrpsdtlrevtvtvlsrklcnsqsyyngdpfitkdmvcagdak gqkdsckgdaggplickgvfhaivsgghecgvatkpgiytlltkkyqtwiksnlvpphtn