Histone modifications control the lytic gene expression of herpes simplex virus 1 (HSV-1). The heterochromatin mark. trimethylation of histone H3 on lysine (K) 9 (H3K9me3). is detected on HSV-1 genomes at early phases of infection to repress viral gene transcription. https://allfixelectricales.shop/product-category/vacuum-motor-filter/