Chains and heterogens:
PDB Chain Sequences:
>3w53A (A:) mgsshhhhhhssglvprgshmasmtggqqmgrgsmmnhlsqkfawpkeflwgsataaaqi egaghsygkedsvwdafarkegaiaggenlevavdhyhryredvqlmrelgldsyrfsts warvvpggrtvnpegldfysrlvdellengilpwltlyhwdlpqaleerggwtnretsyk fleyaetvheklgdrvkhwttfneplcssligyaagehapgrqepqaalaavhhqhlahg latarlrelgaehigitlnltnavpnnpgdpvdleaarrvdalwnrmyldpvlrgsyped lledvqglglaevieagdleiisqpidflgvnhyhddnvsghplpagqpqpvvptdspks spfvgseyvtfpardlprtamgwevnpeglrvllnrlnqdyanlpslyitengasytdtv teagtvedpereeyilnhldavvraiadgvdvrgyfvwslldnfewawgyakrfgiihvd yqtqvrtiknsgkayagliaanrtma
>3w53A (A:) mnhlsqkfawpkeflwgsataaaqiegaghsygkedsvwdafarkegaiaggenlevavd hyhryredvqlmrelgldsyrfstswarvvpggrtvnpegldfysrlvdellengilpwl tlyhwdlpqaleerggwtnretsykfleyaetvheklgdrvkhwttfneplcssligyaa gehapgrqepqaalaavhhqhlahglatarlrelgaehigitlnltnavpnnpgdpvdle aarrvdalwnrmyldpvlrgsypedlledvqglglaevieagdleiisqpidflgvnhyh ddnvsghplpagqpqpvvptdspksspfvgseyvtfpardlprtamgwevnpeglrvlln rlnqdyanlpslyitengasytdtvteagtvedpereeyilnhldavvraiadgvdvrgy fvwslldnfewawgyakrfgiihvdyqtqvrtiknsgkayagliaanrt