Chains and heterogens:
PDB Chain Sequences:
>6pkjA (A:) aaqtnapwglarisstspgtstyyydesagqgscvyvidtgieashpefegraqmvktyy yssrdgnghgthcagtvgsrtygvakktqlfgvkvlddngsgqystiiagmdfvasdknn rncpkgvvaslslgggysssvnsaaarlqssgvmvavaagnnnadarnyspasepsvctv gasdrydrrssfsnygsvldifgpgtsilstwiggstrsisgtsmatphvaglaaylmtl gkttaasacryiadtankgdlsnipfgtvnllaynnyqa