X-ray diffraction studies on photosystem I fragments from a blue-green alga, Anabaena variabilis, and spinach.

X-ray diffraction studies on photosystem I fragments from a blue-green alga, Anabaena variabilis, and spinach. Research Abstract Details 

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X-ray diffraction studies on photosystem I fragments from a blue-green alga, Anabaena variabilis, and spinach. Abstract Text:

Y Tsukamoto,T Ueki,M Kataoka,T Mitsui,

Photosystem I fragments were prepared from thylakoid membranes of a blue-green alga (Anabaena variabilis) and spinach by treatment with a detergent, Triton X-100. Equatorial X-ray diffraction patterns were recorded on films for oriented specimens of thylakoid membranes and photosystem I fragments. The thylakoid membranes and photosystem I fragments gave essentially the same equatorial diffraction patterns in both Anabaena variabilis and spinach, indicating that the major X-ray scatterers in these thylakoid membranes are the molecular assembly of photosystem I. The equatorial X-ray diffraction from the photosystem I fragments of Anabaena variabilis and spinach extends to the reciprocal space of 1/7 A-1. The diffraction pattern exhibits six to nine distinct maxima though they are diffuse, indicating that the arrangement of the constituent molecules in photosystem I has a definite geometrical regularity. The radial autocorrelation functions indicate that the maximal sizes of photosystem I in these thylakoid membranes are about 100 A, and the geometrical regularity does not correspond to a crystalline order. The X-ray diffraction patterns from photosystem I fragments from Anabaena variabilis and spinach are quite similar to each other, suggesting the possibility that the molecular structures of photosystem I in Anabaena variabilis and spinach have a fundamental similarity. These diffraction patterns, however, are different from that of the chromatophore obtained from a photosynthetic bacterium, Rhodospirillum rubrum.

X-ray diffraction studies on photosystem I fragments from a blue-green alga, Anabaena variabilis, and spinach. Publishing Authors By Initials

Y Tsukamoto,T Ueki,M Kataoka,T Mitsui,

For similar investigative techniques: chemistry, analytical: crystallography: x-ray diffraction research abstracts see: investigative techniques: chemistry, analytical: crystallography: x-ray diffraction research

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X-ray diffraction studies on photosystem I fragments from a blue-green alga, Anabaena variabilis, and spinach. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of biochemistry

VOLUME: 95

Page Numbers: 575-9

Journal Abbreviation: J. Biochem.

ISSN: 0021-924X

DAY: 19

MONTH: Feb

YEAR: 1984

X-ray diffraction studies on photosystem I fragments from a blue-green alga, Anabaena variabilis, and spinach. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 376600

X-ray diffraction studies on photosystem I fragments from a blue-green alga, Anabaena variabilis, and spinach. Keywords Mesh Terms:

KEYWORDS: X-Ray Diffraction

MESH TERMS: analysis

Chemical & Substance for Abstract: X-ray diffraction studies on photosystem I fragments from a blue-green alga, Anabaena variabilis, and spinach. Information

Substance Name: NADP

Registry Number: 53-59-8

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Country: JAPAN

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MEDLINETA: J Biochem

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