Chains and heterogens:
PDB Chain Sequences:
>1pif_ (-) eyapqtqsgrtsivhlfewrwvdialecerylgpkgfggvqvsppnenvvvtnpsrpwwe ryqpvsyklctrsgnenefrdmvtrcnnvgvriyvdavinhmcgsgaaagtgttcgsycn pgsrefpavpysawdfndgkcktasggiesyndpyqvrdcqlvglldlalekdyvrsmia dylnklidigvagfridaskhmwpgdikavldklhnlntnwfpagsrpfifqevidlgge aissseyfgngrvtefkygaklgtvvrkwsgekmsylknwgegwgfmpsdralvfvdnhd nqrghgaggssiltfwdarlykvavgfmlahpygftrvmssyrwarnfvngedvndwigp pnnngvikevtinadttcgndwvcehrwreirnmvwfrnvvdgqpfanwwdngsnqvafg rgnrgfivfnnddwqlsstlqtglpggtycnvisgdkvgnsctgikvyvssdgtaqfsis nsaqdpfiaihaeskl