Txoj kev cais thiab ntxuav cov nucleic acids yog dab tsi?

Cov kua qaub nucleic, suav nrog DNA thiab RNA, yog cov biomolecules tseem ceeb uas ua lub luag haujlwm tseem ceeb hauv kev tshawb fawb txog noob caj noob ces, molecular biology, thiab biotechnology. Lub peev xwm los cais thiab ntxuav cov nucleic acids no yog qhov tseem ceeb rau ntau yam kev siv, suav nrog cloning, sequencing, thiab kev tshuaj xyuas gene expression. Nucleic acid purification systems suav nrog ntau yam txheej txheem tsim los rho tawm thiab ntxuav nucleic acids los ntawm cov qauv biological. Tsab xov xwm no tshawb nrhiav cov txheej txheem rau kev cais thiab ntxuav cov nucleic acids thiab qhia txog qhov tseem ceeb ntawm cov kab ke no hauv kev tshawb fawb niaj hnub no.

Nkag siab txog kev ntxuav nucleic acid

Kev ntxuav cov kua qaub nucleic yog hais txog kev rho tawm DNA lossis RNA los ntawm cov cell lossis cov ntaub so ntswg, ua raws li kev tshem tawm cov khoom tsis huv xws li cov protein, lipids, thiab lwm yam khib nyiab cellular. Qhov huv si thiab kev ncaj ncees ntawm cov kua qaub nucleic cais tawm yog qhov tseem ceeb rau cov ntawv thov downstream, vim tias cov khoom tsis huv tuaj yeem tiv thaiv cov tshuaj tiv thaiv enzymatic thiab cuam tshuam rau qhov tseeb ntawm cov txiaj ntsig sim.

Cov txheej txheem dav dav rau kev rho tawm thiab ntxuav cov kua qaub nucleic

Kev rho tawm Phenol-chloroform:Txoj kev ib txwm no siv cov organic solvents los cais cov nucleic acids ntawm cov protein thiab lwm yam khoom ntawm lub cellular. Cov qauv no tau sib xyaw nrog phenol thiab chloroform, ua rau cov nucleic acids faib ua aqueous phase, thaum cov protein tseem nyob hauv organic phase. Tom qab centrifugation, cov aqueous phase uas muaj nucleic acids raug sau thiab precipitated nrog ethanol.

Cov txheej txheem ua raws li silica gel:Cov ntaub thaiv silica gel siv dav hauv cov khoom siv ntxuav nucleic acid lag luam. Lub hauv paus ntsiab lus ntawm txoj kev no yog tias nucleic acids khi rau silica gel ntawm cov ntsev ntau. Tom qab khi, cov khoom tsis huv raug ntxuav tawm, thiab tom qab ntawd cov nucleic acids raug eluted nrog cov buffer ntsev tsawg lossis dej. Txoj kev no tau nyiam vim nws ua haujlwm sai, ua haujlwm tau zoo, thiab tsim cov nucleic acids huv si.

Kev ntxuav cov hlaws dai sib nqus:Cov txheej txheem no siv cov hlaws sib nqus uas muaj cov tshuaj nucleic acid binding agents. Thaum ib qho qauv raug sib xyaw nrog cov hlaws sib nqus, cov nucleic acids yuav nqus mus rau saum npoo ntawm cov hlaws. Tom qab ntawd cov hlaws raug cais tawm ntawm cov tshuaj siv hlau nplaum, yog li tshem tawm cov khoom tsis huv. Txoj kev no siv tau ntau yam thiab tuaj yeem ua tau automation, ua rau nws tsim nyog rau cov ntawv thov high-throughput.

Cov txheej txheem chromatography:Txoj kev no suav nrog kev xa cov qauv mus rau hauv ib lub kem chromatographic uas muaj ib theem ruaj khov uas xaiv khaws cov nucleic acids. Ntau hom kem sib txawv siv tau, suav nrog cov uas raws li kev tsis suav nrog qhov loj me lossis cov ntsiab cai pauv ion. Cov nucleic acids tawm ntawm kem, ua rau cov qauv huv.

Cov txheej txheem enzymatic:Cov txheej txheem enzymatic, xws li cov uas siv DNase lossis RNase, siv tau los xaiv cov nucleic acids lossis cov khoom tsis huv uas tsis xav tau. Txoj kev no muaj txiaj ntsig zoo thaum ua cov qauv nyuaj, xws li cov uas muaj DNA thiab RNA.

Xaus lus

Kev rho tawm thiab kev ntxuav cov nucleic acid yog cov kauj ruam tseem ceeb hauv kev tshawb fawb txog molecular biology thiab kev siv.Cov txheej txheem ntxuav nucleic acidmuab ntau txoj hauv kev rau cov kws tshawb fawb kom tau txais cov kua qaub nucleic zoo uas haum rau cov ntawv thov downstream. Txawm hais tias siv cov tshuaj rho tawm phenol-chloroform ib txwm muaj lossis cov txheej txheem niaj hnub xws li silica gel lossis magnetic bead-based purification, qhov kev xaiv ntawm txoj kev nyob ntawm qhov xav tau tshwj xeeb ntawm kev sim thiab qhov xwm txheej ntawm cov qauv. Nrog rau kev nce qib ntawm thev naus laus zis, cov txheej txheem purification no tau hloov pauv tas li, txhim kho kev ua haujlwm zoo, ceev, thiab kev ntseeg siab, thaum kawg txhim kho cov peev xwm ntawm cov kws tshawb fawb hauv kev tshawb fawb molecular biology.