Chains and heterogens:
PDB Chain Sequences:
>2iasA (A:) ipvieplftkvtedipgaegpvfdkngdfyivapevevngkpageilridlktgkktvic kpevngyggipagcqcdrdanqlfvadmrlgllvvqtdgtfeeiakkdsegrrmqgcndc afdyegnlwitapagevapadytrsmqekfgsiycfttdgqmiqvdtafqfpngiavrhm ndgrpyqlivaetptkklwsydikgpakienkkvwghipgtheggadgmdfdednnllva nfgsshievfgpdggqpkmrircpfekpsnlhfkpqtktifvtehennavwkfewqrngk kqycetlkfgif