Chains and heterogens:
PDB Chain Sequences:
>3fk4A (A:) msgiiatylihddshnlekkaeqialgltigswthlphllqeqlkqhkgnvihveelaeh ehtnsylrkkvkrgiikieypllnfspdlpailtttfgklsldgevklidltfsdelkkh fpgpkfgidgirnllqvhdrpllmsifkgmigrnigylktqlrdqaiggvdivkddeilf enaltpltkrivsgkevlqsvyetyghktlyavnltgrtfdlkenakravqagadillfn vfaygldvlqslaeddeipvpimahpavsgaysasklygvssplllgkllryagadfslf pspygsvalekeealaiskylteddasfkksfsvpsagihpgfvpfivrdfgkdvvinag ggihghpngaqgggkafrtaidatlqnkplhevddinlhsalqiwgnpsyevkl
>3fk4A (A:) giiatylihddshnlekkaeqialgltigeqlkqhkgnvihveelaehehtnsylrkkvk rgiikieypllnfspdlpailtttfgklsldgevklidltfsdelkkhfpgpkfgidgir nllqvhdrpllmsifkgmigrnigylktqlrdqaiggvdivkddeilfenaltpltkriv sgkevlqsvyetyghktlyavnltgrtfdlkenakravqagadillfnvfaygldvlqsl aeddeipvpimahpavsgaysasklygvssplllgkllryagadfslfpspykeealais kylteddasfkksfsvpsagihpgfvpfivrdfgkdvvinagggihghpngaqgggkafr taidatlqnkplhevddinlhsalqiwg
>3fk4B (B:) msgiiatylihddshnlekkaeqialgltigswthlphllqeqlkqhkgnvihveelaeh ehtnsylrkkvkrgiikieypllnfspdlpailtttfgklsldgevklidltfsdelkkh fpgpkfgidgirnllqvhdrpllmsifkgmigrnigylktqlrdqaiggvdivkddeilf enaltpltkrivsgkevlqsvyetyghktlyavnltgrtfdlkenakravqagadillfn vfaygldvlqslaeddeipvpimahpavsgaysasklygvssplllgkllryagadfslf pspygsvalekeealaiskylteddasfkksfsvpsagihpgfvpfivrdfgkdvvinag ggihghpngaqgggkafrtaidatlqnkplhevddinlhsalqiwgnpsyevkl
>3fk4B (B:) giiatylihddshnlekkaeqialgltiglphllqeqlkqhkgnvihveelaehehtnsy lrkkvkrgiikieypllnfspdlpailtttfgklsldgevklidltfsdelkkhfpgpkf gidgirnllqvhdrpllmsifkgmigrnigylktqlrdqaiggvdivkddeilfltpltk rivsgkevlqsvyetyghktlyavnltgrtfdlkenakravqagadillfnvfaygldvl qslaeddeipvpimahpavsgaysasklygvssplllgkllryagadfslfpspykeeal aiskylteddasfkksfsvpsagihpgfvpfivrdfgkdvvinagggihghpngaqgggk afrtaidatlqnkplhevddinlhsalqiwg