TL;DR: Interestingly, above a critical concentration, the addition of palmitic, stearic or eicosanoic acids caused a transition from a one-step to two-step process, and the influence of the molecular properties of the additives on the kinetic parameters was assessed.
TL;DR: The fatty acids of 40 strains, representing 24 species, of rapid-growing mycobacteria were analysed by gas chromatography and mass spectrometry and some strains were found to contain 2-methyl branched-chain acids.
Abstract: The fatty acids of 40 strains, representing 24 species, of rapid-growing mycobacteria were analysed by gas chromatography and mass spectrometry. Tuberculostearic acid and straight-chain fatty acids, ranging from 14 to 24 carbon atoms, were detected in all studied strains. Some strains were found to contain 2-methyl branched-chain acids: 2-methyl-2-octadecenoic acid was identified in Mycobacterium fortuitum, 2,4-dimethyl-2-eicosenoic acid in M. smegmatis and 2,4-dimethyl eicosanoic acid in M. tokaiense.