Chains and heterogens:
PDB Chain Sequences:
>2xyl_ (-) attlkeaadgagrdfgfaldpnrlseaqykaiadsefnlvvaenamkwdatepsqnsfsf gagdrvasyaadtgkelyghtlvwhsqlpdwaknlngsafesamvnhvtkvadhfegkva swdvvneafadgggrrqdsafqqklgngyietafraaraadptaklcindynveginaks nslydlvkdfkargvpldcvgfqshlivgqvpgdfrqnlqrfadlgvdvriteldirmrt psdatklatqaadykkvvqacmqvtrcqgvtvwgitdkyswvpdvfpgegaalvwdasya kkpayaavmeaf