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Non-radioactive antibody probes

Fig. 28. Synthesis of labeled DNA probes. A Labeled DNA can be generated using different enzymes (Klenow fragment of DNA polymerase or a terminal transferase) to incorporate labeled nucleotides into specific DNA sequences. Probes can be labeled using radioactive nucleotides or nucleotides labeled with an immunogenic molecule such as biotin. B The labeled probe is then hybridized to the target nucleic acid, which is either bound to a membrane or in a tissue section or cell. An antibody is then used to detect the non-radioactively-labeled probe. C The antibody may be conjugated to a fluorescent or chemiluminescent dye, or an enzyme that produces a color reaction. The target nucleic acid is thus visualized. Fig. 28. Synthesis of labeled DNA probes. A Labeled DNA can be generated using different enzymes (Klenow fragment of DNA polymerase or a terminal transferase) to incorporate labeled nucleotides into specific DNA sequences. Probes can be labeled using radioactive nucleotides or nucleotides labeled with an immunogenic molecule such as biotin. B The labeled probe is then hybridized to the target nucleic acid, which is either bound to a membrane or in a tissue section or cell. An antibody is then used to detect the non-radioactively-labeled probe. C The antibody may be conjugated to a fluorescent or chemiluminescent dye, or an enzyme that produces a color reaction. The target nucleic acid is thus visualized.

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