We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleVitamin B12 synthesis by human small intestinal bacteriaAuthorsAlbert, M. J.; Mathan, V. I.; Baker, S. J.PublicationNature, 1980, Vol 283, Issue 5749, p781ISSN0028-0836Publication typearticleDOI10.1038/283781a0