Chains and heterogens:
PDB Chain Sequences:
>1r12A (A:) ivptrelenvflgrckdyeitryldilprvrsdcsalwkdffkafsfknpcdldlgsykd fftsaqqqlpknkvmfwsgvydeahdyantgrkyitledtlpgymlnslvwcgqranpgf nekvcpdfktcpvqaresfwgmasssyahsaegevtymvdgsnpkvpayrpdsffgkyel pnltnkvtrvkvivlhrlgekiiekcgagslldleklvkakhfafdcvenpravlfllcs dnpnarecrlakrfyria
>1r12A (A:) ivptrelenvflgrckdyeitryldilprvrsdcsalwkdffkafsfknpcdldlgsykd fftsaqqqlpknkvmfwsgvydeahdyantgrkyitledtlpgymlnslvwcgqranpgf nekvcpdfktcpvqaresfwgmasssyahsaegevtymvdgsnpkvpayrpdsffgkyel pnltnkvtrvkvivlhrlgekiiekcgagslldleklvkakhfafdcvenpravlfllcs dnpnarecrla
>1r12B (B:) ivptrelenvflgrckdyeitryldilprvrsdcsalwkdffkafsfknpcdldlgsykd fftsaqqqlpknkvmfwsgvydeahdyantgrkyitledtlpgymlnslvwcgqranpgf nekvcpdfktcpvqaresfwgmasssyahsaegevtymvdgsnpkvpayrpdsffgkyel pnltnkvtrvkvivlhrlgekiiekcgagslldleklvkakhfafdcvenpravlfllcs dnpnarecrlakrfyria
>1r12B (B:) ivptrelenvflgrckdyeitryldilprvrsdcsalwkdffkafsfknpcdldlgsykd fftsaqqqlpknkvmfwsgvydeahdyantgrkyitledtlpgymlnslvwcgqranpgf nekvcpdfktcpvqaresfwgmasssyahsaegevtymvdgsnpkvpayrpdsffgkyel pnltnkvtrvkvivlhrlgekiiekcgagslldleklvkakhfafdcvenpravlfllcs dnpnarecrla