Video: Heterochromatin vs euchromatin yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov sib txawv loj ntawm heterochromatin thiab euchromatin yog tias heterochromatin yog ib feem ntawm cov chromosomes, uas yog ib daim ntawv khov kho thiab yog genetic inactive, thaum euchromatin yog ib daim ntawv uas tsis muaj coiled (loosely) packed ntawm chromatin thiab muaj genetic active.
Cov lus nug tseem yog, puas yog nucleus euchromatin lossis heterochromatin?
Euchromatin thiab Heterochromatin . DNA nyob hauv nucleus muaj nyob rau hauv ob daim ntawv uas qhia txog theem ntawm kev ua ntawm tes. Euchromatin Nws muaj nyob rau hauv cov hlwb uas ua haujlwm nyob rau hauv kev hloov pauv ntawm ntau ntawm lawv cov noob thaum heterochromatin muaj ntau nyob rau hauv cov hlwb uas tsis tshua muaj zog los yog tsis ua haujlwm.
Ib yam li ntawd, koj txhais li cas los ntawm euchromatin? Euchromatin yog ib daim ntawv me me ntawm chromatin (DNA, RNA, thiab cov protein) uas yog enriched nyob rau hauv cov noob, thiab feem ntau (tab sis tsis tas li) nyob rau hauv active transcription. Euchromatin suav nrog feem ntau ntawm cov genome hauv lub cell nucleus. 92% ntawm tib neeg genome yog euchromatic.
Tsis tas li ntawd, ua li cas heterochromatin ua euchromatin?
Facultative heterochromatin , uas tuaj yeem ua rau tsis muaj mob euchromatin , ntawm qhov tod tes, yog qhov muaj zog ntau dua hauv qhov xwm txheej thiab tuaj yeem tsim thiab hloov pauv hauv cov lus teb rau cov teeb liab ntawm tes thiab cov kev ua gene [1]. Cov cheeb tsam no feem ntau muaj cov ntaub ntawv genetic ntaub ntawv uas yuav muab transcribed thaum lub sij hawm cell voj voog.
Heterochromatin siv rau dab tsi?
Muaj nuj nqi. Heterochromatin tau txuam nrog ntau lub zog, los ntawm kev tswj cov noob mus rau kev tiv thaiv ntawm 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 protein ntau uas feem ntau khi DNA lossis nws cov khoom cuam tshuam.
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