A plant locus essential for phylloquinone (vitamin K1) biosynthesis originated from a fusion of four eubacterial genes.
Gross J, Cho WK, Lezhneva L, Falk J, Krupinska K, Shinozaki K, Seki M, Herrmann RG, Meurer J. J Biol Chem. 2006 Jun 23; 281(25):17189-17196. Epub 2006 Apr 15.