| http://www.w3.org/ns/prov#value | - Most known phosphate compounds, and subsequently the phosphorylated target molecules, can be categorized into one of three groups; 1) individual phosphate groups (e.g., inorganic phosphate or a phosphate group (PO3) on a protein or peptide); 2) multiple-linked phosphate group (e.g., pyrophosphate or a nucleotide such as ATP); or 3) bridging phosphate group (i.e., nucleic acids).
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