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Circadian expression of the carbonic anhydrase gene,Cah1, inChlamydomonas reinhardtii

✍ Scribed by Shoko Fujiwara; Norio Ishida; Mikio Tsuzuki

Book ID: 104615704
Publisher: Springer
Year: 1996
Tongue: English
Weight: 598 KB
Volume: 32
Category: Article
ISSN: 0167-4412
DOI: 10.1007/bf00020215

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✦ Synopsis

We have investigated whether the expression of carbonic anhydrase genes (Cahl and Cah2) is regulated by a circadian clock in Chlamydomonas. When cells were grown in ordinary air under 12 h light/12 h dark (LD) cycles, the levels of the Cah2 mRNA hardly altered during the cycles, while the Cahl mRNA showed a strong diurnal rhythm. The rhythm of about 24 h continued at least 3 days even under continuous light. Temperature compensation of the rhythm was demonstrated, using cultures maintained at 16, 22, and 28 °C. These results indicate that the abundance of the Cahl transcript is controlled by a circadian clock.

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