membrane permeability assessment
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http://www.bioassayontology.org/bao#BAO_0000167
Live cells with intact membranes have the ability to exclude dyes that easily penetrate dead or damaged cells. Examples of the dyes include propidium iodide, 7-amino actinomycin D, and trypan blue. Cells stained with the former two can be quantified by flow cytometry, while the latter is by manual counting using hemocytometer.
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membrane permeability assessment
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