Phosphate fraction and metabolic functions Inorganic form Most is orthophosphate, and a miner extent as pyrophosphate(焦磷酸盐). Organic form: The organic forms of phosphate are compounds in which the orthophosphate is esterified with hydroxy groups and alcohols or bound by a pyrophosphate bond to another bond to another phosphate groupPhosphate fraction and metabolic functions • Inorganic form: • Most is orthophosphate, and a miner extent as pyrophosphate(焦磷酸盐). • Organic form: • The organic forms of phosphate are compounds in which the orthophosphate is esterified with hydroxyl groups and alcohols or bound by a pyrophosphate bond to another bond to another phosphate group