Chains and heterogens:
PDB Chain Sequences:
>1szkA (A:) mnsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhp kvvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavk iaraatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgise ddaiasihrifkndaapediaaiviepvqgsggfyasspafmqrlralcdehgimliade vqsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyag npiacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielf edgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqc fdeakq
>1szkA (A:) nsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhpk vvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavki araatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgised daiasihrifkndaapediaaiviepvqgsggfyasspafmqrlralcdehgimliadev qsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyagn piacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielfe dgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqcf deakq
>1szkB (B:) mnsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhp kvvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavk iaraatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgise ddaiasihrifkndaapediaaiviepvqgsggfyasspafmqrlralcdehgimliade vqsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyag npiacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielf edgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqc fdeakq
>1szkB (B:) nsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhpk vvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavki araatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgised daiasihrifkndaapediaaiviepvqgsggfyasspafmqrlralcdehgimliadev qsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyagn piacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielfe dgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqcf deakq
>1szkC (C:) mnsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhp kvvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavk iaraatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgise ddaiasihrifkndaapediaaiviepvqgsggfyasspafmqrlralcdehgimliade vqsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyag npiacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielf edgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqc fdeakq
>1szkC (C:) nsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhpk vvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavki araatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgised daiasihrifkndaapediaaiviepvqgsggfyasspafmqrlralcdehgimliadev qsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyagn piacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielfe dgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqcf deakq
>1szkD (D:) mnsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhp kvvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavk iaraatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgise ddaiasihrifkndaapediaaiviepvqgsggfyasspafmqrlralcdehgimliade vqsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyag npiacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielf edgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqc fdeakq
>1szkD (D:) nsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhpk vvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavki araatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgised daiasihrifkndaapediaaiviepvqgsggfyasspafmqrlralcdehgimliadev qsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyagn piacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielfe dgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqcf deakq