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DNA Res. 2000 Oct 31;7(5):305-7.

Generation of expressed sequence tags from low-CO2 and high-CO2 adapted cells of Chlamydomonas reinhardtii.

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  • 1Kazusa DNA Research Institute, Chiba, Japan.


To characterize genes whose expression is induced in carbon-stress conditions, 12,969 and 13,450 5'-end expressed sequence tags (ESTs) were generated from cells grown in low-CO2 and high-CO2 conditions of the unicellular green alga, Chlamydomonas reinhardtii. These ESTs were clustered into 4436 and 3566 non-redundant EST groups, respectively. Comparison of their sequences with those of 3433 non-redundant ESTs previously generated from the cells under the standard growth condition indicated that 2665 and 1879 EST groups occurred only in the low-CO2 and high-CO2 populations, respectively. It was also noted that 96.2% and 96.0% of the cDNA species respectively obtained from the low-CO2 and high-CO2 conditions had no similar EST sequence deposited in the public databases. The EST species identified only in the low-CO2 treated cells included genes previously reported to be expressed specifically in low-CO2 acclimatized cells, suggesting that the ESTs generated in this study will be a useful source for analysis of genes related to carbon-stress acclimatization. The sequence information and search results of each clone will appear at the web site:

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