Chains and heterogens:
PDB Chain Sequences:
>1u2yA (A:) eyspntqqgrtsivhlfewrwvdialecerylapkgfggvqvsppnenvaiynpfrpwwe ryqpvsyklctrsgnedefrnmvtrcnnvgvriyvdavinhmcgnavsagtsstcgsyfn pgsrdfpavpysgwdfndgkcktgsgdienyndatqvrdcrltglldlalekdyvrskia eymnhlidigvagfrldaskhmwpgdikaildklhnlnsnwfpagskpfiyqevidlgge pikssdyfgngrvtefkygaklgtvirkwngekmsylknwgegwgfvpsdralvfvdnhd nqrghgaggasiltfwdarlykmavgfmlahpygftrvmssyrwprqfqngndvndwvgp pnnngvikevtinpdttcgndwvcehrwrqirnmvifrnvvdgqpftnwydngsnqvafg rgnrgfivfnnddwsfsltlqtglpagtycdvisgdkingnctgikiyvsddgkahfsis nsaedpfiaihaeskl