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Testing NF-kappa B1-p50 antibody specificity using knockout mice


, : Testing NF-kappa B1-p50 antibody specificity using knockout mice. Oncogene 13(2): 445-446

Cell extracts from knockout mice can provide definitive proof of antibody specificity. Two NF-kappa B1-p50 antibodies, sc-114 (a commercial antibody) and NR1157, were observed to recognize proteins having distinct electrophoretic mobilities of 52-55 kD and 50 kD, respectively, by Western blot analysis. In order to discriminate the specificity of these antibodies for NF-kappa B1-p50, whole cell extracts derived from NF-kappa B1-p105 knockout mice were employed. While the NR1157 antibody completely failed to recognize its 50 kD product in p105-/- knockout extracts, the sc-114 antibody still strongly recognized its 52-55 kD product. These data demonstrate that NR1157, but not sc-114, is highly specific for NF-kappa B1-p50 by Western blot analysis. In addition, these results highlight the utility of knockout cell extracts for discerning antibody specificity.

US$29.90

PMID: 8710386


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