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A simple DNA-dependent fluorescence enhancement assay for cell number

CJ Adams and B Storrie

A DNA-dependent fluorescence enhancement assay using the dye Hoechst 33258 was developed to quantitate cell number in crude detergent lysates of cells. The assay, which uses a simple filter fluorometer, is sensitive enough to measure 1 x 10(4) cells without interference from mercaptans, culture media, and protein solutions. They assay can be done with freeze-thawed lysates. Fluorescence intensity values are linearly related to cell number in the range of 1 x 10(4) to 2.5 x 10(5) cells for L-929, BHK, and CHO-Kl cell lines.

Volume 29, Issue 2, pp. 326-328, 02/01/1981
Copyright © 1981 by The Histochemical Society


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