Chains and heterogens:
PDB Chain Sequences:
>1uke_ (-) ekskpnvvfvlggpgsgkgtqcanivrdfgwvhlsagdllrqeqqsgskdgemiatmikn geivpsivtvkllknaidanqgknflvdgfprneennnsweenmkdfvdtkfvlffdcpe evmtqrllkrgessgrsddniesikkrfntfnvqtklvidhynkfdkvkiipanrdvnev yndvenlfksmgf