presqualene phosphate + phosphate + H(+) => presqualene diphosphate + H2O
presqualene phosphate + phosphate + h(+) => presqualene diphosphate + h2o
presqualene phosphate + phosphate + H(+) => presqualene diphosphate + H2O
presqualene phosphate + phosphate + h(+) => presqualene diphosphate + h2o