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Biophysical Journal 27: 317-321 (1979)
© 1979 the Biophysical Society

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Voltage transients from photo-isomerizing azo dye in bilayer membranes.

J R Duchek and J S Huebner

ABSTRACT

Voltage transients are induced by brief light flashed on bilayer membranes with absorbed 3,3'-bis(alpha-(trimethylammonium)methyl)azobenzene (Bis-Q). The voltages are positive for trans-to-cis photo-isomerization, and negative for cis-to-trans photo-isomerization. The risetimes in phosphatidylethanolamine-decane bilayer membranes indicate that absorbed trans-Bis-Q is photo-isomerized to cis within 2 microseconds, and that cis is photo-isomerized to trans within 15 microseconds.






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Copyright © 1979 by the Biophysical Society.