RNA polymerases. · HAT histoonide atsetüültranseferaas. Histone acetyltransferases (HATs) are enzymes that acetylate conserved lysine amino acids on histone proteins by transferring an acetyl group from acetyl CoA to form -N-acetyllysine. DNA is wrapped around histones, and by transferring an acetyl group to the histones, genes can be turned on and off. Histone acetylation increases gene expression. In general, histone acetylation is linked to transcriptional activation and associated with euchromatin. Jaguneb A tüüpi (nukleosoomis) ja B tüüpi (tsütoplasmasa) HAT'deks. · Transkriptsioon on matriitssüntees, mille käigus sünteesitakse DNA molekuli ühe ahela nukleotiidse järjestusega komplementaarne RNA molekul. Protsess toimub rakutuumas interfaasi ajal
2006). solution to crustacean processing waste accu- The authors found significant shelf life exten- mulation (Shahidi et al. 1999). Chitosan is sion of 2°C stored product, with standard reported to have antimicrobial properties. plate counts of 6.8, 3.8, and 1.6 log10 CFU/g Factors that improve antimicrobial activity for air, vacuum, and vacuum-2% chitosan are a low degree of acetylation and a low pH, stored samples on day 14, respectively. both of which increase solubility (Shahidi et al. 1999). Due to the highly reactive nature Essential Oils of polycationic chitosan, which readily inter- acts with proteins, fats, and other anionic Plant-derived essential oil components compounds, chitosan antimicrobial activity is may be active against bacteria but are diffi-
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