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Trout Testis Cells

III. ACETYLATION OF HISTONES IN DIFFERENT CELL TYPES FROM DEVELOPING TROUT TESTIS

From the ¹ From the Department of Biochemistry, The University of British Columbia, Vancouver 8, British Columbia, Canada

Acetylation of histones has been observed in both the spermatocytes and spermatids from developing trout testis. In the former cell type, both histone synthesis and extensive acetylation occur, whereas in the spermatids there is histone acetylation, but very little synthesis. The half-life of the histone acetyl groups is approximately 23 hours in the pre-spermatid cells. It is suggested that the acetylation of histones in spermatids may serve a different function from the corresponding modification observed in the earlier testis cells.

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