J Histochem Cytochem. 1979 Jan;27(1):36-43.

Autofluorescence of viable cultured mammalian cells.

Abstract

The autofluorescence other than intrinsic protein emission of viable cultured mammalian cells has been investigated. The fluorescence was found to originate in discrete cytoplasmic vesicle-like regions and to be absent from the nucleus. Excitation and emission spectra of viable cells revealed at least two distinct fluorescent species. Comparison of cell spectra with spectra of known cellular metabolites suggested that most, if not all, of the fluorescence arises from intracellular nicotinamide adenine dinucleotide (NADH) and riboflavin and flavin coenzymes. Various changes in culture conditions did not affect the observed autofluorescence intensity. A multiparameter flow system (MACCS) was used to compare the fluorescence intensities of numerous cultured mammalian cells.

PMID:: 220325; [PubMed - indexed for MEDLINE]

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