Lysosomal membrane ascorbate-dependent ferrireductase CYB561A3 MVSGRFYLSC LLLGSLGSMC ILFTIYWMQY WRGGFAWNGS IYMFNWHPVL MVAGMVVFYG GASLVYRLPQ SWVGPKLPWK LLHAALHLMA FVLTVVGLVA VFTFHNHGRT ANLYSLHSWL GITTVFLFAC QWFLGFAVFL LPWASMWLRS LLKPIHVFFG AAILSLSIAS VISGINEKLF FS