MeSH definition : Colorless, endogenous or exogenous pigment precursors that may be transformed by biological
mechanisms into colored compounds; used in biochemical assays and in diagnosis as
indicators, especially in the form of enzyme substrates. Synonym: chromogens (not
to be confused with pigment-synthesizing bacteria also called chromogens).;
MeSH annotation : colorless ... precursors that may be transformed ... into colored cpds; used in biochem
assays & ... as indicators; D25-26 qualif; DF: CHROMOGENIC CPDS;
Colorless, endogenous or exogenous pigment precursors that may be transformed by biological
mechanisms into colored compounds; used in biochemical assays and in diagnosis as
indicators, especially in the form of enzyme substrates. Synonym: chromogens (not
to be confused with pigment-synthesizing bacteria also called chromogens).