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Expression of Chlamydomonas CDK homologs. RT-PCR products were detected by Southern blotting (CDKA1, B1, C1, G1, H1) or ethidium bromide staining (CDKE1). Fraction of cells that had passed Commitment and completed cell division when the sample was prepared is indicated at the bottom. α-Tubulin transcript (TUA1) detected by ethidium bromide staining serves as an internal control.
