Chains and heterogens:
PDB Chain Sequences:
>1qf9A (A:) mekskpnvvfvlggpgsgkgtqcanivrdfgwvhlsagdllrqeqqsgskdgemiatmik ngeivpsivtvkllknaidanqgknflvdgfprneennnsweenmkdfvdtkfvlffdcp eevmtqrllkrgessgrsddniesikkrfntfnvqtklvidhynkfdkvkiipanrdvne vyndvenlfksmgf