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. 1987 Jul;7(7):2360–2366. doi: 10.1128/mcb.7.7.2360

Transcription of novel genes, including a gene linked to the mating-type locus, induced by Chlamydomonas fertilization.

P J Ferris, U W Goodenough
PMCID: PMC365367  PMID: 3614194

Abstract

Six cDNA clones have been identified that are complementary to transcripts present in young zygotes of Chlamydomonas reinhardtii but absent from vegetative and gametic cells. Five early transcripts are synthesized within 5 to 10 min of fertilization; the sixth, late, transcript is not synthesized until 90 min following fertilization. Synthesis of both classes requires cell fusion between gametes. Cycloheximide fails to inhibit early mRNA synthesis, indicating that transcription factors must preexist in the gametes and be activated by cytoplasmic confluence. By contrast, cycloheximide blocks synthesis of the late transcript, suggesting that an early protein product(s) is required for expression of the late gene. Restriction fragment length polymorphism analysis of inter- and intraspecific genetic crosses demonstrates that one of the early genes is very tightly linked to the mating-type locus.

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Selected References

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