Chains and heterogens:
PDB Chain Sequences:
>1j16A (A:) ivggytcqensvpyqvslnsgyhfcggslindqwvvsaahcyksriqvrlgehninvleg neqfvnaakiikhpnfdretynndimliklsspvklnarvatvalpsscapagtqclisg wgntlssgvnepdllqcldapllpqadceasssfiitdnmvcvgfleggkdacqgdsggp vvcngelqgivswgygcalpdnpgvytkvcnyvdwiqdtiaan