[phosphate](n-1) + phosphate + H(+) => [phosphate](n) + H2O
[phosphate](n-1) + phosphate + h(+) => [phosphate](n) + h2o
[phosphate](n-1) + phosphate + H(+) => [phosphate](n) + H2O
[phosphate](n-1) + phosphate + h(+) => [phosphate](n) + h2o