Time-resolved fluorescence spectroscopy and photolysis of the photoreceptor blepharismin.
Time-resolved fluorescence spectroscopy and photolysis of the photoreceptor blepharismin.
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光感受器 blepharismin 的时间分辨荧光光谱和光解。
DOI:
10.1016/0005-2728(93)90203-r
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发表时间:
1993
期刊:
影响因子:
--
通讯作者:
Song,PS
中科院分区:
文献类型:
--
作者:
Yamazaki,T;Yamazaki,I;Nishimura,Y;Dai,R;Song,PS
Blepharismin is the photoreceptor for the photophobic response in the ciliateBlepharisma japonicum(Scevoli, P., Bisi, F., Colombetti, G., Ghetti, F., Lenci, F., and Passarelli, V. (1987) J. Photochem. Photobiol.: B. Biol. 1, 75-84; Lenci, F., Ghetti, F., Gioffre, D., Heelis, P.F., Thomas, B., Phillips, G.O., and Song, P.-S. (1989) J. Photochem. Photobiol.: B. Biol. 3, 449-453). Blepharismin was solubilized from the red cells with 2% n-octylglucopyranoside. A crude pigment-protein preparation was then successively subjected to Bio-Gel A1.5 filtration, FPLC/hydroxyapatite and FPLC/DEAE ion-exchange chromatography. At least two spectrally distinct forms of blepharismin, with the respective absorbance maxima at 597 ± 1 and 601 ± 1 nm, were resolved. The steady state fluorescence emission maxima were at 602.5 and 617.5 nm, respectively. The fluorescence decay curves for these pigments were non-exponential. The major component possesses relatively short fluorescence lifetime (200–500 ps) for the former, according to a global analysis. This analysis suggests that the excited state of the shorter wavelength-absorbing form of blepharismin undergoes primary photoprocess faster than that of the free parental chromophore hypericin. Photolysis of blepharismin in solution yielded a irreversible product, accompanied by a 10–12 nm bathochromic shift of the absorbance maximum. However, the mechanistic nature of the time-resolved fluorescence and the photochemistry of blepharismin remains to be elucidated.
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影响因子:
3.3
作者:
G. Checcucci;G. Damato;F. Ghetti;F. Lenci
通讯作者:
F. Lenci
DOI:
10.1016/1011-1344(89)80049-1
发表时间:
1989
期刊:
Journal of photochemistry and photobiology. B, Biology
影响因子:
--
作者:
F. Lenci;F. Ghetti;D. Gioffrè;V. Passarelli;P. Song;P. F. Heelis;B. Thomas;G. Phillips
通讯作者:
G. Phillips
DOI:
10.1016/1011-1344(87)80007-6
发表时间:
1987
影响因子:
5.4
作者:
Patrizia Scevoli;F. Bisi;G. Colombetti;F. Ghetti;F. Lenci;V. Passarelli
通讯作者:
V. Passarelli
DOI:
10.1016/0167-4838(90)90144-5
发表时间:
1990
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Kim,IH;Rhee,JS;Huh,JW;Florell,S;Faure,B;Lee,KW;Kahsai,T;Song,PS;Tamai,N;Yamazaki,T
通讯作者:
Yamazaki,T
DOI:
10.1007/978-1-4684-7003-1_4
发表时间:
1981
影响因子:
5.4
作者:
A. C. Giese
通讯作者:
A. C. Giese