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毛霉感光色素的线性二色性和取向

Linear dichroism and orientation of the Phycomyces photopigment.

作者信息

Jesaitis A J

出版信息

J Gen Physiol. 1974 Jan;63(1):1-21. doi: 10.1085/jgp.63.1.1.

Abstract

The greater sensitivity of a cylindrical Phycomyces sporangiophore to blue light polarized transversely rather than longitudinally is a consequence of the dichroism and orientation of the receptor pigment. The abilities of wild type and several carotene mutants to distinguish between the two directions of polarization are the same. The E-vector angle for maximum response relative to the transverse direction is 42 +/- 4 degrees at 280 nm, 7 degrees +/- 3 degrees at 456 nm, and 7 degrees +/- 8 degrees at 486 nm. The in vivo attenuation of polarized light at these wavelengths is very small. The polarized light effect in Phycomyces cannot arise from reflections at the cell surface or from differential attenuations due to internal screening or scattering.

摘要

圆柱形毛霉孢子囊柄对横向偏振蓝光比对纵向偏振蓝光具有更高的敏感性,这是受体色素的二向色性和取向的结果。野生型和几种胡萝卜素突变体区分两种偏振方向的能力是相同的。相对于横向方向,最大响应的电场矢量角度在280nm时为42±4度,在456nm时为7±3度,在486nm时为7±8度。在这些波长下,偏振光在体内的衰减非常小。毛霉中的偏振光效应不可能源于细胞表面的反射,也不可能源于内部屏蔽或散射引起的差异衰减。

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引用本文的文献

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THE REFRACTIVE INDICES OF WHOLE CELLS.全细胞的折光指数。
J Gen Physiol. 1933 Sep 20;17(1):41-7. doi: 10.1085/jgp.17.1.41.
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Action and Transmission Spectra of Phycomyces.毛霉的作用光谱和透射光谱
Plant Physiol. 1960 Mar;35(2):194-204. doi: 10.1104/pp.35.2.194.
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Growth responses of Phycomyces to polarized light stimuli.毛霉对偏振光刺激的生长反应。
Science. 1959 Aug 7;130(3371):336. doi: 10.1126/science.130.3371.336.
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Absorption and screening in Phycomyces.毛霉中的吸收与筛选
J Gen Physiol. 1967 Aug;50(7):1893-906. doi: 10.1085/jgp.50.7.1893.
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Carotenes and retinal in Phycomyces mutants.毛霉突变体中的胡萝卜素和视黄醛。
Plant Physiol. 1968 Aug;43(8):1279-83. doi: 10.1104/pp.43.8.1279.

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