Resten findes i blødt væv som phosphat, hovedsagelig som bestanddel af protein, phospholipider og nukleinsyrer; 520 mmol (0,2-0,6 g) forekommer intracellulært i et stort antal forskellige phosphorylerede stoffer (f. eks. adenosin triophosphat (ATP), guanosin triophosphat o.s.v.), som behøves til metaboliske energitransport- og -lagringsprocesser, enzymaktivering og kontrol.
The residue is in soft tissues as phosphate, mainly as a component of proteins, phospholipids and nucleic acids; 520 mmol (0.20.6 g) is present intracellularly in a large variety of phosphorylated compounds (e.g. adenosine triphosphate (ATP), guanosine triphosphate, etc.) which are needed for metabolic energy transfer and storage processes, enzyme activation and control.