| http://www.w3.org/ns/prov#value | - [0130] Y is an oxygen or sulfur atom; [0131] B is a nitrogen-containing heterocyclic base; [0132] S is an acyclic moiety, carbocyclic moiety or sugar moiety; [0133] P-L is a phosphorylated label which preferably becomes independently detectable when the phosphate is removed, [0134] wherein L is an
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