Chains and heterogens:
PDB Chain Sequences:
>3pgm_ (-) pklvlvrhgqsewneknlftgwvdvklsakgqqeaaragellkekgvnvlvdytsklsra iqtanialekadrlwipvnrswrlnerhygdlqgkdkaqtlkkfgeekfntyrrsfdvpp ppidasspfsqkgderykyvdpnvlpeteslalvidrllpywqdviaklvgktsmiaahg nslrglvkhlegisdadiaklnippgtilvfeldenlkpskpsyyldpea