Three Lactobacillus helveticus 53/7 genes essential for the biosynthesis of
isopentenyl diphosphate and the gene coding for a putative carotenoid bios
ynthesis protein were for the first time identified from lactic acid bacter
ia, The deduced amino acid sequences of the mevalonate pathway gene product
s share significant identity with corresponding proteins of a few gram-posi
tive cocci and Streptomyces species.