A comparative analysis of proteins from chloroplast nucleoids was performed in two higher-plant species (Pisum sativumL. andArabidopsis thalianaL.) and a green alga Chlamydomonas reinhardtiiDang. In the nucleoids of the higher plants and the alga, 26–27 proteins were detected with their mol wts ranging from 10 to more than 94 kD. In all the species tested, the distribution of nucleoid proteins by their mol wts was similar, especially between the predominant proteins with mol wts of 10 to 40 kD. Six DNA-binding proteins (12–18 kD) were detected in nucleoids fromCh. reinhardtiichloroplasts after in vivocovalent cross-linking between chloroplast DNA and proteins. Under an electron miscroscope, some regular structures resembling nucleosome-like particles of bacterial cells were revealed.
Russian Journal of Plant Physiology – Springer Journals
Published: Oct 10, 2004
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