Researchers from Kyushu University have found that H3mm15, a histone H3. 3 subvariant, contributes to normal sperm development in mice by helping regulate gene expression during spermatogenesis. The findings show that H3mm15 cannot be interchanged with conventional H3.
Source: [Phys.org](https://phys.org/news/2026-11-small-histone-differences-gene-sperm.html)