Chains and heterogens:
PDB Chain Sequences:
>1cr6A (A:) rvaafdldgvlalpsiagafrrseealalprdfllgayqtefpegpteqlmkgkitfsqw vplmdesyrksskacganlpenfsisqifsqamaarsinrpmlqaaialkkkgfttcivt nnwlddgdkrdslaqmmcelsqhfdfliescqvgmikpepqiynflldtlkakpnevvfl ddfgsnlkpardmgmvtilvhntasalrelekvtgtqfpeaplpvpcnpndvshgyvtvk pgirlhfvemgsgpalclchgfpeswfswryqipalaqagfrvlaidmkgygdsssppei eeyamellckemvtfldklgipqavfighdwagvmvwnmalfypervravaslntpfmpp dpdvspmkvirsipvfnyqlyfqepgvaeaeleknmsrtfksffrasdetgfiavhkate iggilvntpedpnlskitteeeiefyiqqfkktgfrgplnwyrnternwkwsckglgrki lvpalmvtaekdivlrpemsknmekwipflkrghiedcghwtqiekptevnqilikwlqt e
>1cr6A (A:) rvaafdldgvlalpsigpteqlmkgkitfsqwqifsqamaarsinrpmlqaaialkkkgf ttcivtnnwlddgdkrdslaqmmcelsqhfdfliescqvgmikpepqiynflldtlkakp nevvflddfgsnlkpardmgmvtilvhntasalrelekvtgtqfpeaplpvpcnpndvsh gyvtvkpgirlhfvemgsgpalclchgfpeswfswryqipalaqagfrvlaidmkgygds ssppeieeyamellckemvtfldklgipqavfighdwagvmvwnmalfypervravasln tpfmppdpdvspmkvirsipvfnyqlyfqepgvaeaeleknmsrtfksffrasdetgfia vhkateiggilvntpedpnlskitteeeiefyiqqfkktgfrgplnwyrnternwkwsck glgrkilvpalmvtaekdivlrpemsknmekwipflkrghiedcghwtqiekptevnqil ikwlqte
>1cr6B (B:) rvaafdldgvlalpsiagafrrseealalprdfllgayqtefpegpteqlmkgkitfsqw vplmdesyrksskacganlpenfsisqifsqamaarsinrpmlqaaialkkkgfttcivt nnwlddgdkrdslaqmmcelsqhfdfliescqvgmikpepqiynflldtlkakpnevvfl ddfgsnlkpardmgmvtilvhntasalrelekvtgtqfpeaplpvpcnpndvshgyvtvk pgirlhfvemgsgpalclchgfpeswfswryqipalaqagfrvlaidmkgygdsssppei eeyamellckemvtfldklgipqavfighdwagvmvwnmalfypervravaslntpfmpp dpdvspmkvirsipvfnyqlyfqepgvaeaeleknmsrtfksffrasdetgfiavhkate iggilvntpedpnlskitteeeiefyiqqfkktgfrgplnwyrnternwkwsckglgrki lvpalmvtaekdivlrpemsknmekwipflkrghiedcghwtqiekptevnqilikwlqt e