Chains and heterogens:
PDB Chain Sequences:
>1fr7A (A:) mshhwgygkhngpehwhkdfpiakgerqspvdidthtakydpslkplsvsydqatslril nnghafnvefddsqdkavlkggpldgtyrliqshlhmgsldgqgsehtvdkkkyaaelhl vhwntkygdfgkavqqpdglavlgiflkvgsakpglqkvvdvldsiktkgksadftnfdp rgllpesldywtypgslttppllecvtwivlkepisvsseqvlkfrklnfngegepeelm vdnwrpaqplknrqikasfk
>1fr7A (A:) wgygkhngpehwhkdfpiakgerqspvdidthtakydpslkplsvsydqatslrilnngh afnvefddsqdkavlkggpldgtyrliqshlhmgsldgqgsehtvdkkkyaaelhlvhwn tkygdfgkavqqpdglavlgiflkvgsakpglqkvvdvldsiktkgksadftnfdprgll pesldywtypgslttppllecvtwivlkepisvsseqvlkfrklnfngegepeelmvdnw rpaqplknrqikasfk
>1fr7B (B:) mshhwgygkhngpehwhkdfpiakgerqspvdidthtakydpslkplsvsydqatslril nnghafnvefddsqdkavlkggpldgtyrliqshlhmgsldgqgsehtvdkkkyaaelhl vhwntkygdfgkavqqpdglavlgiflkvgsakpglqkvvdvldsiktkgksadftnfdp rgllpesldywtypgslttppllecvtwivlkepisvsseqvlkfrklnfngegepeelm vdnwrpaqplknrqikasfk
>1fr7B (B:) wgygkhngpehwhkdfpiakgerqspvdidthtakydpslkplsvsydqatslrilnngh afnvefddsqdkavlkggpldgtyrliqshlhmgsldgqgsehtvdkkkyaaelhlvhwn tkygdfgkavqqpdglavlgiflkvgsakpglqkvvdvldsiktkgksadftnfdprgll pesldywtypgslttppllecvtwivlkepisvsseqvlkfrklnfngegepeelmvdnw rpaqplknrqikasfk