Chains and heterogens:
PDB Chain Sequences:
>1cz1A (A:) awdydnnvirgvnlggwfvlepymtpslfepfqngndqsgvpvdeyhwtqtlgkeaalri lqkhwstwiteqdfkqisnlglnfvripigywafqlldndpyvqgqvqylekalgwarkn nirvwidlhgapgsqngfdnsglrdsynfqngdntqvtlnvlntifkkyggneysdvvig iellneplgpvlnmdklkqffldgynslrqtgsvtpviihdafqvfgywnnfltvaegqw nvvvdhhhyqvfsggelsrnindhisvacnwgwdakkeshwnvagewsaaltdcakwlng vnrgaryegaydnapyigscqplldisqwsdehktdtrryieaqldafeytggwvfwswk tenapewsfqtltynglfpqpvtdrqfpnqcgfh