Prokaryotic transcription thiab translation tshwm sim ib txhij nyob rau hauv lub cytoplasm, thiab kev cai tshwm sim nyob rau theem transcriptional Eukaryotic noob qhia yog tswj thaum lub sij hawm transcription thiab RNA ua, uas tshwm sim nyob rau hauv lub nucleus, thiab thaum lub sij hawm txhais lus protein, uas tshwm sim nyob rau hauv lub cytoplasm.
Kev tswj kev hloov pauv nyob qhov twg?
In Summary: Post-TransCRIPTIONAL Control of Gene Expression
Post-transcriptional control tuaj yeem tshwm sim ntawm txhua theem tom qab kev sau ntawv, suav nrog RNA splicing, nuclear shuttling, thiab RNA stability. Thaum RNA tau sau tseg, nws yuav tsum tau ua tiav los tsim RNA paub tab uas npaj tau los txhais.
Txoj cai txhais lus tshwm sim nyob qhov twg?
Kev pib txhais lus yog tswj hwm los ntawm nkag mus ntawm ribosomes rau Shine-Dalgarno sequence Qhov kev ncab ntawm plaub mus rau cuaj purine residues nyob rau ntawm qhov pib codon thiab hybridize mus rau pyrimidine - nplua nuj nyob ze ntawm 3' kawg ntawm 16S RNA hauv 30S kab mob ribosomal subunit.
Kev tswj hwm noob caj noob ces nyob qhov twg?
Txoj cai tom qab kev hloov pauv yog kev tswj cov noob qhia ntawm qib RNA. Nws tshwm sim ib zaug RNA polymerase tau txuas nrog cov noob tus txhawb nqathiab tau ua ke cov nucleotide ib ntus.
kev cai tshwm sim nyob qhov twg?
Gene regulation tuaj yeem tshwm sim ntawm txhua qhov chaw thaum lub sij hawm gene qhia, tab sis feem ntau tshwm sim nyob rau theem ntawm kev hloov pauv (thaum cov ntaub ntawv hauv cov noob DNA tau dhau mus rau mRNA). Cov teeb liab los ntawm ib puag ncig lossis los ntawm lwm lub hlwb ua kom cov proteins hu ua transcription factor.
