Heterochromatin yog dab tsi? Cov kws tshawb fawb yav dhau los tau pom heterochromatin ua "cov noob caj noob ces" nrog rau kev ua haujlwm lom me me (Pardue thiab Hennig 1990). Intriguingly, kev hloov pauv cuam tshuam rau heterochromatin tsim ntawm centromeres kawg ua rau muaj qhov tsis xws luag hauv chromosome segregation, yog li ua rau genome instability.
Qhov tshwm sim ntawm kev tsim ntawm heterochromatin rau lub cell yog dab tsi?
Qhov tshwm sim ntawm heterochromatin yog dab tsi? Txawm hais tias cov qauv chromatin ntawm interphase thiab mitotic chromosomes yog compact heev, DNA-binding proteins thiab protein complexes yuav tsum tau nkag mus rau DNA molecule. … Txhua tus tetramers muaj ob lub subunits ntawm cov proteins histone.
Qhov tshwm sim ntawm heterochromatin tsim noob caj noob ces yog dab tsi?
Thaum lub ntim heterochromatin kis thoob plaws heterochromatin / euchromatin ciam teb, nws ua rau transcriptional ntsiag to hauv tus qauv stochastic. … Heterochromatin protein HP1a khi H3K9me2/3 thiab cuam tshuam nrog SU(VAR)3-9, tsim kom muaj lub cim xeeb tseem ceeb.
Kev ua haujlwm ntawm heterochromatin yog dab tsi?
Heterochromatin tau cuam tshuam nrog ntau lub luag haujlwm, los ntawm kev tswj hwm noob mus rau kev tiv thaiv chromosome kev ncaj ncees; Qee lub luag haujlwm no tuaj yeem raug ntaus nqi los ntawm cov ntim ntom ntom ntawm DNA, uas ua rau nws tsis tshua nkag mus rau cov khoom muaj protein ntau uas feem ntau khi. DNA lossis nws cov yam ntxwv cuam tshuam.
Yuav ua li cas heterochromatin tswj cov noob qhia?
Heterochromatin yam tseem ceeb kuj kho cov kev sib cuam tshuam ntev ntawm kev ywj pheej ntawm CTCF thiab cohesin, muab cov txheej txheem ntawm chromatin folding uas tswj cov noob qhia.
