Typical purple bacterial photosynthetic units consist of light harvesting one/reaction centre ‘core’ complexes surrounded by light harvesting two complexes. Factors such as the number and size of photosynthetic units per cell, as well as the type of light harvesting two complex that is produced, are controlled by environmental factors. In this paper, the change in the type of LH2 present in the Rhodopsuedomonas acidophila strain 7050 is described when cells are grown at a range of different light intensities. This species contains multiple pucBA genes that encode the apoproteins that form light-harvesting complex two, and a more complex mixture of spectroscopic forms of this complex has been found than was previously thought to be the case. Femto-second time resolved absorption has been used to investigate how the energy transfer properties in the membranes of high-light and low-light adapted cells change as the composition of the LH2 complexes varies.

中文翻译：

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嗜酸红假单胞菌菌株7050适应不同光强度下的生长：改变LH2类型有什么好处？

典型的紫色细菌光合作用单元由光捕获一个/反应中心的“核心”复合物组成，周围是光捕获两个复合物。诸如环境因素控制着每个单元的光合作用单元的数量和大小，以及产生的光收集两种复合物的类型等因素。在本文中，描述了当细胞在不同光强度范围内生长时，嗜酸红假单胞菌7050菌株中LH2类型的变化。该物种包含多个puc与以前认为的情况相比，已经发现了编码脱辅基蛋白的BA基因，该脱辅基蛋白形成了光捕获复合物2，并且该复合物的光谱形式的混合物更为复杂。飞秒时间分辨吸收已被用于研究高光和低光适应细胞膜中的能量转移特性如何随着LH2复合物组成的变化而变化。