Chains and heterogens:
PDB Chain Sequences:
>1sf2A (A:) mnsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhp kvvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavk iaraatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgise ddaiasihrifkndaapediaaiviepvqgeggfyasspafmqrlralcdehgimliade vqsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyag npiacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielf edgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqc fdeakq
>1sf2A (A:) nsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhpk vvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavki araatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgised daiasihrifkndaapediaaiviepvqgeggfyasspafmqrlralcdehgimliadev qsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyagn piacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielfe dgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqcf deakq
>1sf2B (B:) mnsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhp kvvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavk iaraatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgise ddaiasihrifkndaapediaaiviepvqgeggfyasspafmqrlralcdehgimliade vqsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyag npiacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielf edgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqc fdeakq
>1sf2B (B:) nsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhpk vvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavki araatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgised daiasihrifkndaapediaaiviepvqgeggfyasspafmqrlralcdehgimliadev qsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyagn piacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielfe dgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqcf deakq
>1sf2C (C:) mnsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhp kvvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavk iaraatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgise ddaiasihrifkndaapediaaiviepvqgeggfyasspafmqrlralcdehgimliade vqsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyag npiacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielf edgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqc fdeakq
>1sf2C (C:) nsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhpk vvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavki araatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgised daiasihrifkndaapediaaiviepvqgeggfyasspafmqrlralcdehgimliadev qsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyagn piacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielfe dgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqcf deakq
>1sf2D (D:) mnsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhp kvvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavk iaraatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgise ddaiasihrifkndaapediaaiviepvqgeggfyasspafmqrlralcdehgimliade vqsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyag npiacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielf edgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqc fdeakq
>1sf2D (D:) nsnkelmqrrsqaiprgvgqihpifadraencrvwdvegreyldfaggiavlntghlhpk vvaaveaqlkklshtcfqvlayepylelceimnqkvpgdfakktllvttgseavenavki araatkrsgtiafsgayhgrthytlaltgkvnpysagmglmpghvyralypcplhgised daiasihrifkndaapediaaiviepvqgeggfyasspafmqrlralcdehgimliadev qsgagrtgtlfameqmgvapdlttfaksiaggfplagvtgraevmdavapgglggtyagn piacvaalevlkvfeqenllqkandlgqklkdgllaiaekhpeigdvrglgamiaielfe dgdhnkpdakltaeivarardkglillscgpyynvlrilvpltiedaqirqgleiisqcf deakq