preferred_name: cytochrome b2 (flavin-free derivative of flavocytochrome b2)
preferred_name_lc: cytochrome b2 (flavin-free derivative of flavocytochrome b2)
label: cytochrome b2 (flavin-free derivative of flavocytochrome b2)
label_lc: cytochrome b2 (flavin-free derivative of flavocytochrome b2)