Metabolic intermediate

Metabolic intermediates (or metabolites) are an intermediate or end product of metabolism. In this discovery, an enzyme's activity was sustained with the addition of inorganic phosphate. This showed the importance of phosphate groups in metabolism, and other metabolites were soon discovered.
 Arthur Harden England 1905 Metabolic intermediate

Metabolic intermediates (or metabolites) are an intermediate or end product of metabolism. In this discovery, an enzyme's activity was sustained with the addition of inorganic phosphate. This showed the importance of phosphate groups in metabolism, and other metabolites were soon discovered.