Erythrosin and pH gradient induced photo-voltages in bilayer membranes

Varnadore, W.E.; Arrieta, R.T.; Duchek, J.R.; Huebner, J.S.

Journal of Membrane Biology 65(1-2): 147-153

1982


ISSN/ISBN: 0022-2631
PMID: 6276554
DOI: 10.1007/bf01870478
Accession: 005382546

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Abstract
Erythrosin and light flashes induce voltage transients across bilayer membranes in the presence of transmembrane pH gradients. Fast voltage transients, which rise in < 50 ns and fall in .apprx. 500 ns, are attributed to photo-deprotonation of dye sorbed in the glycerol region of phospholipid membranes. Six other halogenated xanthene dyes induce similar effects, which apparently resulted from triplet states of monoanionic dye. No photo-effects were observed with fluorescein.

Erythrosin and pH gradient induced photo-voltages in bilayer membranes