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The xanthophyll cycle pigments, violaxanthin and zeaxanthin, present outside the light-harvesting pigment–protein complexes of Photosystem II (LHCII) considerably enhance specific aggregation of proteins as revealed by analysis of the 77 K chlorophyll a fluorescence emission spectra. Analysis of the infrared absorption spectra in the Amide I region shows that the aggregation is associated with formation...
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