presqualene diphosphate + H2O <=> 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(+)