vˈaɪɾəmɪn kˈeɪ tˈuː, ˈɔːlsoʊ nˈoʊn æz mˈɛnɐkwˌɪnɑːn, ɪz vˈɛɹi ɪmpˈoːɹtənt fɔːɹ ᵻlˈɛktɹɑːn tɹˈænspoːɹt tə fjˈuːmæɹət ɪn ˈiː. kˈoʊli.
Vitamin K2, also known as menaquinone, is very important for electron transport to fumarate in E. coli.