FY23 (pHVX2), FY23 (CAT2-mit) and FY23 (CAT2-cyt) strains were used for a series of fermentations of a synthetic medium containing 8% w/v glucose and supplemented with L-carnitine (100 mg L 1). During these fermentations, each strain’s production of volatile compounds was analysed by GC/MS and compared with that of the respective empty- vector control strain. Fermentations were performed as described in the Materials and methods section, and samples for analysis were taken after 4 and 7 days of fermentation. In addition to the concentration of volatile aroma compounds, sugar consumption was also measured. After 4 days of growth, virtually all the sugar had been fermented in all ferments.