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 rendering atoms b12 bacterial closeup e-coli enteric escherichia germs health hydroxocobalamine microorganism multivitamin pathogenic scientific