Chains and heterogens:
PDB Chain Sequences:
>1ql9A (A:) ivggytcqensvpyqvslnsgyhfcggslindqwvvsaahcyksriqvrlgehninvleg neqfvnaakiikhpnfdretynndimliklsspvklnarvatvalpsscapagtqclisg wgntlssgvnepdllqcldapllpqadceasypgkitdnmvcvgfleggkdscqgdsggp vvcngelqgivswgygcalpdnpgvytkvcnyvdwiqdtiaan