The Mechanism of Propionic Acid Formation by Clostridium propionicum Johns, A. T.,, 6, 123-127 (1952), doi = https://doi.org/10.1099/00221287-6-1-2-123, publicationName = Microbiology Society, issn = 1350-0872, abstract= Summary: Clostridium propionicum evidently possesses a mechanism for the conversion of lactate to propionate different from that found in the previously studied propionic acid producing bacteria. Reactions common to certain propioni-bacteria and Veillonella gazogenes which could not be demonstrated with Cl. propionicum include: (a) the decarboxylation of succinic acid; (b) the fermentation of malate and fumarate; (c) the variation in the ratio of acetic to propionic acid according to the concentration of CO2; (d) the fixation of CO2 in propionic acid., language=, type=