Chains and heterogens:
PDB Chain Sequences:
>1iezA (A:) mnqtllssfgtpfervenalaalregrgvmvlddedrenegdmifpaetmtveqmaltir hgsgivclcitedrrkqldlpmmvenntsaygtgftvtieaaegvttgvsaadrittvra aiadgakpsdlnrpghvfplraqaggvltrgghteatidlmtlagfkpagvlceltnddg tmarapeciefankhnmalvtiedlvayrqaherkas