Chains and heterogens:
PDB Chain Sequences:
>1b23P (P:) akgefirtkphvnvgtighvdhgkttltaaltyvaaaenpnvevkdygdidkapeerarg itintahveyetakrhyshvdcpghadyiknmitgaaqmdgailvvsaadgpmpqtrehi llarqvgvpyivvfmnkvdmvddpelldlvemevrdllnqyefpgdevpvirgsallale emhknpktkrgenewvdkiwelldaideyiptpvrdvdkpflmpvedvftitgrgtvatg riergkvkvgdeveivglapetrktvvtgvemhrktlqegiagdnvglllrgvsreever gqvlakpgsitphtkfeasvyilkkeeggrhtgfftgyrpqfyfrttdvtgvvrlpqgve mvmpgdnvtftvelikpvaleeglrfaireggrtvgagvvtkile