6.4.1.6 acetone + CO2 + ATP + H2O - 6.4.1.6 acetone + CO2 + ATP + H2O initial step in acetone metabolism 6.4.1.6 butanone + CO2 + ATP + H2O strain KN Bun08 also carboxylates also butanone 6.4.1.6 additional information not present at detectable levels in cells grown with carbon sources other than acetone 6.4.1.6 additional information operon acxABC encoding acetone carboxylase is involved in survival of the bacterium in stomach