The utilisation of CO2 in the dissimilation of glycerol by the propionic acid bacteria

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Abstract
A quantitative determination of the products of glycerol dissimilation by bacteria of the genus Propionibacterium has shown (1) that CO2 obtained from CaCO3 is utilized by the bacteria in fermenting glycerol; (2) that not only propionic, but also acetic, succinic and even lactic acids are now clearly demonstrated to be produced from glycerol. The idea of a 4- and 2-carbon cleavage is questioned and the re-examination of existing data is necessitated by the important observation of COa utilization in this genus. These questions are discussed in relation to the mechanism of glycerol dissimilation.

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