Chains and heterogens:
PDB Chain Sequences:
>1gpzA (A:) ikcpqpktldeftiiqnlqpqyqfrdyfiatckqgyqliegnqvlhsftavcqddgtwhr amprckikdcgqprnlpngdfrytttmgvntykariqyychepyykmqtragsreseqgv ytctaqgiwkneqkgekiprclpvcgkpvnpveqrqqiiggqkakmgnfpwqvftnihgr gggallgdrwiltaahtlypkeheaqsnasldvflghtnveelmklgnhpirrvsvhpdy rqdesynfegdiallelensvtlgpnllpiclpdndtfydlglmgyvsgfgvmeekiahd lrfvrlpvanpqacenwlrgknrmdvfsqnmfcaghpslkqdacqgdsggvfavrdpntd rwvatgivswgigcsrgygfytkvlnyvdwikkemeeed
>1gpzA (A:) ikcpqpktldeftiiqnlqpqyqfrdyfiatckqgyqliegnqvlhsftavcqddgtwhr amprckikdcgqprnlpngdfrytttmgvntykariqyychepyykmqteqgvytctaqg iwkneqkgekiprclpvcgkpvnpveqrqqiiggqkakmgnfpwqvftnihgrgggallg drwiltaahtlypkehasldvflghtnveelmklgnhpirrvsvhpdyrqdesynfegdi allelensvtlgpnllpiclpdndtfydlglmgyvsgfgiahdlrfvrlpvanpqacens qnmfcaghpslkqdacqgdsggvfavrdpntdrwvatgivswgigcsrgygfytkvlnyv dwikkemee
>1gpzB (B:) ikcpqpktldeftiiqnlqpqyqfrdyfiatckqgyqliegnqvlhsftavcqddgtwhr amprckikdcgqprnlpngdfrytttmgvntykariqyychepyykmqtragsreseqgv ytctaqgiwkneqkgekiprclpvcgkpvnpveqrqqiiggqkakmgnfpwqvftnihgr gggallgdrwiltaahtlypkeheaqsnasldvflghtnveelmklgnhpirrvsvhpdy rqdesynfegdiallelensvtlgpnllpiclpdndtfydlglmgyvsgfgvmeekiahd lrfvrlpvanpqacenwlrgknrmdvfsqnmfcaghpslkqdacqgdsggvfavrdpntd rwvatgivswgigcsrgygfytkvlnyvdwikkemeeed
>1gpzB (B:) ikcpqpktldeftiiqnlqpqyqfrdyfiatckqgyqliegnqvlhsftavcqddgtwhr amprckikdcgqprnlpngdfrytttmgvntykariqyychepyykmqtgvytctaqgiw kneqkgekiprclpvcgkpvnpveqrqqiiggqkakmgnfpwqvftnihgrgggallgdr wiltaahtlypkehqsnasldvflghtnveelmklgnhpirrvsvhpdyrqdesynfegd iallelensvtlgpnllpiclpdndtfydlglmgyvsgfgiahdlrfvrlpvanpqaceq nmfcaghpslkqdacqgdsggvfavrdpntdrwvatgivswgigcsrgygfytkvlnyvd wikkemee