Acetylation tshem tawm cov nqi zoo ntawm cov histones, yog li txo qis kev cuam tshuam ntawm N termini ntawm histones nrog cov tsis zoo phosphate pawg ntawm DNA. … So, transcriptionally nquag DNA yog hu ua euchromatin. Ntau condensed (nthuav ntim) DNA yog hu ua heterochromatin.
Puas yog DNA tau txais acetylation?
Cov proteins twg tau txais acetylation? Kev tswj hwm ntawm deoxyribonucleic acid (DNA) thiab lwm yam genetic ntsiab siv histone acetylation. Cov proteins uas rov ua dua DNA thiab kho cov khoom siv caj ces puas raug tsim ncaj qha los ntawm acetylation Acetylation kuj pab hauv DNA transcription.
Qhov txawv ntawm DNA methylation thiab histone acetylation yog dab tsi?
Histone acetylation tshwm sim ntawm lysine residues thiab nws nce gene qhia feem ntau. … Methylation activates los yog represses gene qhia nyob ntawm seb residue yog methylated. K4 methylation activates noob qhia. K27 methylation represses gene expression.
Puas acetylation unwind DNA?
Txoj cai ntawm kev hloov pauv noob caj noob ces yog tswj hwm, tsawg kawg hauv ib feem, los ntawm degree ntawm lub zos unwinding ntawm nucleosomal DNA. Qhov no unwinding yog tswj los ntawm histone acetylation - nce acetylation ua rau ib tug ntau xoob lub qhov txhab qauv tso cai rau nkag mus rau basal transcription yam thiab RNA polymerase II.
DNA methylation thiab acetylation yog dab tsi?
Ntxiv ib pawg acetyl rau tus Tsov tus tw (acetylation) neutralises tus nqi, ua rau DNA tsawg dua coiled thiab nce transcription. Ntxiv ib pawg methyl rau tus Tsov tus tw (methylation) tswj cov nqi zoo, ua rau DNA ntau coiled thiab txo cov kev sau.
