Results 231 to 240 of about 106,503 (264)

Biosynthesis of Chlorophylls a and b in Chlorella vulgaris

Nature, 1960
WE have shown that both carbon atoms of glycine were incorporated into chlorophyll a when Chlorella vulgaris was incubated with 14C-glycine for a period of 1 hr. During this period no carbon-14 from the carboxyl group could be detected in chlorophyll b, whereas the incorporation of the carbon from the methylene group was several times higher than in ...
W, BRZESKI, W, RUECKER
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Fluorescence anisotropy of chlorophyll a and chlorophyll b in castor oil

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1989
A detailed study of the fluorescence anisotropy of chlorophyll a and chlorophyll b in castor oil is presented. Scanningacross the wavelength of emission the value of the fluorescence anisotropy shows a considerable variation. This indicates that differently polarized emission moments are present.
M. van Gurp, G. van Ginkel, Y.K. Levine
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Preparation of chlorophyll a, chlorophyll b and bacteriochlorophyll a by means of column chromatography with diethylaminoethylcellulose

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1978
Abstract Chlorophyll a, chlorophyll b and bacteriochlorophyll a were prepared by means of column chromatography with Sephadex LH-20 and diethylaminoethylcellulose. This method provides purified preparations of chlorophylls in about 3 h. To prepare chlorophyll a, blue-green or red algae were used as the starting material.
N, Sato, N, Murata
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On the enzymatic conversion of 14C-labeled chlorophyll a to 14C-labeled chlorophyll b

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1970
Abstract Through the addition of NADP + to homogenates of soybean leaves incubated in the dark at room temperature with uniformly 14 C-labeled chlorophyll a , significant yields of 14 C-labeled chlorophyll b (purified as pheophytin b ) were obtained.
R K, Ellsworth, H J, Perkins, J P, Detwiller, K, Liu   +3 more
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Cofactor Requirement of the Enzymatic Reduction of Chlorophyll B to Chlorophyll A

1999
There is only little known about the formation and degradation of chlorophyll b (Chl b). Ito et al. [1] suggested a chlorophyll cycle, in which Chl b is converted to Chl a and vice versa. This chlorophyll cycle can be important for the plants: during acclimation from low light to high light conditions the Chl a to Chl b ratio increases [2].
V. Scheumann, S. Schoch, W. Rüdiger
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Photodisaggregation of chlorophyll a and b dimers

Journal of the American Chemical Society, 1979
At room temperature, chlorophyll a (10/sup -4/M) in dry methylcyclohexane containing 0.01M methanol shows only the monomer peak at 661 nm. At -78/sup 0/C, it is partially converted to dimer, absorbing at 695 nm. Flash photolysis using a 30-ns ruby laser probe selectively excites and bleaches the dimer.
N. Periasamy, H. Linschitz
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New chlorophyll-b forms in a chlorophyll-detergent photosynthetic model system

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1975
The absorption spectra of chlorophyll b in Triton X-100 micelles at room temperature are superpositions of components with absorption maxima at 640.8, 648.9, 659.5, 669.6, 682.1 and 695.7 nm, obtained from Gaussian analysis of the spectra. The last four forms strongly overlap the chlorophyll a forms of this system obtained with maxima at 659.3, 667.6 ...
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A NEW PROKARYOTE CONTAINING CHLOROPHYLL-A AND CHLOROPHYLL-B

Nature, 1986
Burger-Wiersma, T., Veenhuis, M., Korthals, H.J., Van de Wiel, C.C.M., Mur, L.R.   +4 more
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Effects of chlorophyll a, chlorophyll b, and xanthophylls on the in vitro assembly kinetics of the major light-harvesting chlorophyll a/b complex, LHCIIb.

Journal of molecular biology, 2001
The major light-harvesting chlorophyll a/b complex (LHCIIb) of photosystem II in higher plants can be reconstituted with pigments in lipid-detergent micelles. The pigment-protein complexes formed are functional in that they perform efficient internal energy transfer from chlorophyll b to chlorophyll a. LHCIIb formation in vitro, can be monitored by the
Reinsberg, D, Ottmann, K, Booth, P J, Paulsen, H   +3 more
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�berf�hrung von Chlorophyll b in Chlorophyll a

Die Naturwissenschaften, 1932
Arthur Stoll, Erwin Wiedemann
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