Chains and heterogens:
PDB Chain Sequences:
>1xc3A (A:) snamlggieaggtkfvcavgredgtiidriefptkmpdetiekviqyfsqfslqaigigs fgpvdndktsqtygtitatpkagwrhypflqtvknemkipvgfstdvnaaalgeflfgea kgldsclyitigtgigagaivegrllqglshpemghiyirrhpddvyqgkcpyhgdcfeg lasgpaiearwgkkaadlsdiaqvwelegyyiaqalaqyililapkkiilgggvmqqkqv fsyiyqyvpkimnsyldfselsddisdyivpprlgsnagiigtlvlahqalqaeaasgev rs
>1xc3A (A:) amlggieaggtkfvcavgredgtiidriefptkmpdetiekviqyfsqfslqaigigsfg pvdndktsqtygtitatpkagwrhypflqtvknemkipvgfstdvnaaalgeflfgeakg ldsclyitigtgigagaivegrllqglshpemghiyirrhpddvyqgkcpyhgdcfegla sgpaiearwgkkaadlsdiaqvwelegyyiaqalaqyililapkkiilgggvmqqkqvfs yiyqyvpkimnsyldfselsddisdyivpprlgsnagiigtlvlahqalqaeaas