Mealybug Chromosome Cycle as a Paradigm of Epigenetics

Figure 7

Epigenetic marks during P. citri spermatogenesis. A drawing representing the behavior of K9H3me3 (red), PCHET2 (green), K9H3me2 (light blue), K20H4me3 (orange), and of the HP2-like protein (pink), during spermatogenesis in P. citri. The HP1-like, PCHET2 is not detectable in sperm heads. According to Koshla et al. [66], sperm chromatin contains also a nuclease resistant fraction (NRC) that is transmitted to the progeny and that can be well considered as a component of the epigenetic machinery.