Biophysical Journal 16: 541-545 (1976)
© 1976 the Biophysical Society

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Picosecond kinetics of the fluorescence from the chromophore of the purple membrane protein of Halobacterium halobium.

ABSTRACT

The fluorescence emission kinetics at 740 nm of the retinylidence chromophore of the purple membrane protein of Halobacterium halobium have been studied. Using picosecond laser pulses and an optical Kerr gate, the fluorescence risetime is found to be less than 8 ps and its lifetime is 40 +/- 5 ps at 90 degrees K and is estimated to be less than 3 ps at room temperature.

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