These sequences, from both Gram-positive and Gram-negative bacteria, represent the alpha subunit of the holoenzyme citrate lyase composed of alpha (EC:2.8.3.10), beta, and acyl carrier protein subunits in a stoichiometric relationship of 6:6:6. Citrate lyase is an enzyme which converts citrate to oxaloacetate. In bacteria, this reaction is involved in citrate fermentation. The alpha subunit catalyzes the reaction Acetyl-CoA + citrate = acetate + (3S)-citryl-CoA. The protein from Lactococcus lactis subsp. lactis (Streptococcus lactis) has been experimentally characterised [1].