[HPr protein]-O-phospho-L-serine + phosphate + H(+) => [HPr protein]-L-serine + diphosphate
[hpr protein]-o-phospho-l-serine + phosphate + h(+) => [hpr protein]-l-serine + diphosphate
[HPr protein]-O-phospho-L-serine + phosphate + H(+) => [HPr protein]-L-serine + diphosphate
[hpr protein]-o-phospho-l-serine + phosphate + h(+) => [hpr protein]-l-serine + diphosphate