Chains and heterogens:
PDB Chain Sequences:
>3blkA (A:) eyssntqqgrtsivhlfewrwvdialecerylapkgfggvqvsppnenvaihnpfrpwwe ryqpvsyklctrsgnedefrnmvtrcnnvgvriyvdavinhmcgnavsagtsstcgsyfn pgsrdfpavpysgwdfndgkcktgsgdienyndatqvrdcrlsglldlalgkdyvrskia eymnhlidigvagfridaskhmwpgdikaildklhnlnsnwfpegskpfiyqevidlgge pikssdyfgngrvtefkygaklgtvirkwngekmsylknwgegwgfmpsdralvfvdnhd nqrghgaggasiltfadarlykmavgfmlahpygftrvmssyrwpryfengkdvndwvgp pndngvtkevtinpdttcgndwvcehrwrqirnmvnfrnvvdgqpftnwydngsnqvafg rgnrgfivfnnddwtfsltlqtglpagtycdvisgdkingnctgikiyvsddgkahfsis nsaedpfiaihaeskl