4.1.1.99 ATP + mevalonate 5-phosphate the enzyme is required for the alternate mevalonate pathway in an archaea Haloferax volcanii ADP + phosphate + isopentenyl phosphate + CO2 - ? 427391 4.1.1.99 ATP + mevalonate 5-phosphate very weak activity with mevalonate and even less with mevalonate 5-diphosphate Haloferax volcanii ADP + phosphate + isopentenyl phosphate + CO2 - ? 427391 4.1.1.99 ATP + mevalonate 5-phosphate the enzyme is required for the alternate mevalonate pathway in an archaea Haloferax volcanii DSM 3757 ADP + phosphate + isopentenyl phosphate + CO2 - ? 427391 4.1.1.99 ATP + mevalonate 5-phosphate very weak activity with mevalonate and even less with mevalonate 5-diphosphate Haloferax volcanii DSM 3757 ADP + phosphate + isopentenyl phosphate + CO2 - ? 427391