cmd.read_pdbstr("""\
""", "chainBk")
cmd.hide("all")
cmd.color('grey70', "chainBk")
cmd.show('ribbon', "chainBk")
cmd.select("e8btkBk1", "c. k & i. 2-70")
cmd.center("e8btkBk1", state=0, origin=1)
cmd.zoom("e8btkBk1", animate=-1)
cmd.show_as('cartoon', "e8btkBk1")
cmd.spectrum('count', 'rainbow', "e8btkBk1")
cmd.disable("e8btkBk1")