beneficial e. coli strains can produce vitamin b12

vitamin probiotic bacterium molecule microbiology science antioxidant biochemistry colon chemical chemistry biology organic three dimensional coli b-12 cell flagellum micro organism pathogen molecular structure biological atom close-up technology infectious disease mid-air levitation magnification microscopic animal nutritional supplement healthcare medicine hygiene intestinal tract infection intestine formula microbes hydroxocobalamin nutrient skeletal healthy microbe flagella bacteriology coenzyme bacteria cobalamin 3d rendering antioxidant atoms b12 bacteria bacterial bacteriology bacterium biochemistry biology chemical chemistry closeup cobalamin coenzyme colon coli e-coli enteric escherichia flagella flagellum formula germs health healthy hydroxocobalamine infection intestinal microbe microbes microbiology microorganism microscopic molecular molecule multivitamin nutrient organic pathogenic probiotic science scientific skeletal structure supplement vitamin b12