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The chemical syntheses of novel digoxigenin-derivatized compounds are described which are modified substrates for enzymatically or photochemically non-radioactive digoxigenin labeling of nucleic acids. Various activated digoxigenin-haptens are coupled to 5-aminoallyl-substituted 2'-deoxyuridine-5'-triphosphate. This results in digoxigenin-modified nucleoside triphosphates of variable spacer lengths (Dig-[4]-dUTP/Dig-[11]-dUTP/Dig-[16]-dUTP) which can be used as substrates for enzymatic labeling of DNA with digoxigenin-haptens by Klenow enzyme-catalysed random-primed synthesis. In addition the synthesis of N-[4-azidobenzoyl]-N'-[(3-O-digoxigeninyl)methylcarbonyl)]-1 ,8-diamino- 3,6-dioxaoctane (photodigoxigenin), a photoactivatable analog of digoxigenin, is described which can be applied for photolabeling of DNA and RNA with digoxigenin-haptens leaving the nucleic acid molecules intact.

biological chemistry hoppe-seyler

Non-radioactive Labeling and Detection of Nucleic Acids. IV. Synthesis and Properties of Digoxigenin-modified 2´ -Deoxyuridine-5’ -triphosphates and a Photoactivatable Analog of Digoxigenin (Photodigoxigenin)