Lub luag haujlwm ntawm daim ntawv qhia kev txwv yog dab tsi?
Lub luag haujlwm ntawm daim ntawv qhia kev txwv yog dab tsi?

Video: Lub luag haujlwm ntawm daim ntawv qhia kev txwv yog dab tsi?

Video: Lub luag haujlwm ntawm daim ntawv qhia kev txwv yog dab tsi?
Video: 6 Nqi Lus Qhia Kev Ua neej ( leej twg mloog lub neej yuav zoo tuaj) 2024, Kaum ib hlis
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Kev txwv tsis pub tshaj tawm yog ib txoj hauv kev siv los qhia txog ntu tsis paub txog DNA los ntawm kev tawg mus rau hauv daim ntawv thiab tom qab ntawd txheeb xyuas qhov chaw ntawm qhov chaw tawg. Txoj kev no tso siab rau kev siv cov proteins hu ua txwv enzymes, uas tuaj yeem txiav, lossis zom, DNA molecules ntawm luv luv, tshwj xeeb ib ntus hu ua chaw txwv.

Hais txog qhov no, kev ua haujlwm ntawm kev txwv enzyme yog dab tsi?

Cov kab mob siv a txwv enzyme los tiv thaiv cov kab mob hu ua bacteriophages, lossis phages. Thaum phage kis tau tus kab mob, nws ntxig nws cov DNA rau hauv cov kab mob ntawm tes kom nws rov ua dua. Cov txwv enzyme tiv thaiv kev rov ua dua ntawm phage DNA los ntawm kev txiav nws mus rau ntau daim.

Qhov thib ob, qhov kev txwv nuclease piav qhia li cas? Txhua txwv endonuclease functions los ntawm 'kev tshuaj xyuas' qhov ntev ntawm DNA ib ntus. Thaum nws pom nws qhov kev lees paub tshwj xeeb, nws khi rau DNA thiab txiav txhua qhov ntawm ob txoj hlua ntawm ob lub helix ntawm cov ntsiab lus tshwj xeeb hauv lawv cov qab zib-phosphate qaum. DNA molecules loj dua qhov loj dua piv rau cov enzymes.

Yog li ntawd, daim ntawv qhia kev txwv siv rau dab tsi?

A daim ntawv qhia txwv yog a daim ntawv qhia ntawm paub txwv cov chaw hauv ib ntu ntawm DNA. Kev txwv daim ntawv qhia xav tau kev siv txwv cov enzymes. Hauv molecular biology, txwv daim ntawv qhia yog siv li ib qho kev siv rau engineer plasmids lossis lwm yam luv luv ntawm DNA, thiab qee zaum rau ntev genomic DNA.

Tib neeg puas muaj kev txwv enzymes?

The HsaI txwv enzyme los ntawm embryos tib neeg , Homo sapiens, tau raug rho tawm nrog ob qho tib si cov ntaub so ntswg extract thiab nuclear extract. Nws ua pov thawj tias qhov txawv txav enzyme , kom meej meej muaj feem xyuam rau hom II endonuclease.

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