Chains and heterogens:
PDB Chain Sequences:
>4ykkA (A:) gsknligrhlrlgsveeqpfmffategcegndcwsgmvndmvvklsedlgftyeyiqpdd rkfgalnkttnewngmirdllddktdmiaidlstnsarksaidysfpfmdagikavvkge gttlnqvlelldqdkykwgvigsrhpetllkthrdsrysrlvdegvelkdlnhaietlrg glfvfidegpvlahnlisdcdvfsvgeefqsfeyafglpkdspykslidshllkfreegf idilwekwssgnsvcs
>4ykkA (A:) nligrhlrlgsveeqpfmffategcegndcwsgmvndmvvklsedlgftyeyiqpddrkf galnkttnewngmirdllddktdmiaidlstnsarksaidysfpfmdagikavvkgegtt lnqvlelldqdkykwgvigsrhpetllkthrdsrysrlvdegvelkdlnhaietlrgglf vfidegpvlahnlisdcdvfsvgeefqsfeyafglpkdspykslidshllkfreegfidi lwekwss
>4ykkB (B:) gsknligrhlrlgsveeqpfmffategcegndcwsgmvndmvvklsedlgftyeyiqpdd rkfgalnkttnewngmirdllddktdmiaidlstnsarksaidysfpfmdagikavvkge gttlnqvlelldqdkykwgvigsrhpetllkthrdsrysrlvdegvelkdlnhaietlrg glfvfidegpvlahnlisdcdvfsvgeefqsfeyafglpkdspykslidshllkfreegf idilwekwssgnsvcs
>4ykkB (B:) gsknligrhlrlgsveeqpfmffategcegndcwsgmvndmvvklsedlgftyeyiqpdd rkfgalnkttnewngmirdllddktdmiaidlstnsarksaidysfpfmdagikavvkge gttlnqvlelldqdkykwgvigsrhpetllkthrdsrysrlvdegvelkdlnhaietlrg glfvfidegpvlahnlisdcdvfsvgeefqsfeyafglpkdspykslidshllkfreegf idilwekwssgnsvc