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Abstract
SUMMARY: Though CO2 is essential for the growth of Leuconostoc mesenteroides strain P60 in the absence of serine, 14CO2 is not incorporated into serine by the growing organism. The synthesis of serine was further studied by using suspensions of a variant strain of L. mesenteroides P60 which formed serine more actively than the parent strain. Glycine, formate, glucose, p-aminobenzoic acid and pyridoxal were required for the synthesis of serine by these suspensions. There was an additional requirement for CO2 only when the organisms had been incubated previously in phosphate-buffered glucose. Leucovorin satisfied the requirement for both CO2 and p-aminobenzoic acid.
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© Society for General Microbiology 1960