Chains and heterogens:
PDB Chain Sequences:
>1fh7A (A:) attlkeaadgagrdfgfaldpnrlseaqykaiadsefnlvvaenamkwdatepsqnsfsf gagdrvasyaadtgkelyghtlvwhsqlpdwaknlngsafesamvnhvtkvadhfegkva swdvvneafadgggrrqdsafqqklgngyietafraaraadptaklcindynveginaks nslydlvkdfkargvpldcvgfqshlivgqvpgdfrqnlqrfadlgvdvriteldirmrt psdatklatqaadykkvvqacmqvtrcqgvtvwgitdkyswvpdvfpgegaalvwdasya kkpayaavmeaf