Trout testis cells. 3. Acetylation of histones in different cell types from developing trout testis.

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 prespermatid 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.