A reversible change nyob rau hauv qhov chaw ntawm hydrogen atom nyob rau hauv ib lub molecule uas hloov nws los ntawm ib tug mus rau lwm lub isomer. Thymine thiab guanine feem ntau nyob hauv keto cov ntaub ntawv, tab sis thaum nyob rau hauv cov ntaub ntawv tsis tshua muaj enol (saib daim duab) lawv tuaj yeem koom tau los ntawm peb daim ntawv cog lus hydrogen nrog keto cov ntaub ntawv ntawm guanine lossis thymine, feem.
Dab tsi yog qhov hloov pauv tautomeric hauv DNA?
Lub spontaneous isomerization ntawm ib lub hauv paus nitrogen rau lwm hom hydrogen-bonding daim ntawv, tejzaum nws ua rau muaj kev hloov. Reversible hloov ntawm proton txoj hauj lwm nyob rau hauv ib tug molecule. hauv paus hauv nucleic acids hloov ntawm keto thiab enol cov ntaub ntawv los yog ntawm cov amino thiab imino cov ntaub ntawv.
Kev hloov pauv tautomeric yog dab tsi thiab hom kev hloov pauv ua li cas?
Kev hloov pauv tautomeric hauv ib txoj hlua tau tsim a kev hloov pauv hauv kev sib txuas ntxiv Yog tias qhov kev hloov pauv tshwm sim hauv cov kab mob, nws yuav raug xa mus rau cov tiam tom ntej. TSEEM CEEB: Nco ntsoov tias kev hloov pauv tautomeric tsis yog nws tus kheej hloov pauv, tab sis kev hloov pauv mus rau lwm hom qauv ntawm cov molecule.
DNA hloov pauv yog dab tsi?
Kev hloov pauv hloov pauv yog kev hloov pauv caj ces tshwm sim los ntawm kev tshem tawm lossis tso rau hauv DNA ib ntus uas hloov txoj hauv kev nyeem. DNA sib lawv liag yog ib tug saw ntawm ntau me me molecules hu ua nucleotides.
Ua tautomeric hloov ua rau qhov hloov pauv?
Ib qho taw tes hloov pauv yog qhov hloov pauv hauv ib qho chaw hauv ib khub. Muaj ntau ntau hom: kev hloov pauv - hloov ntawm ib khub purine / pyrimidine mus rau lwm tus purine / pyrimidine khub. Qhov no tuaj yeem tshwm sim thaum ib tus tswvcuab ntawm tus khub ua ke tau dhau los ua qhov hloov pauv tauthaum lub sijhawm DNA rov ua dua, ua rau nws tsis raug.
