Yuav ua li cas cov amino acid sequence txiav txim cov yam ntxwv ntawm ib tug kab mob?
Yuav ua li cas cov amino acid sequence txiav txim cov yam ntxwv ntawm ib tug kab mob?

Video: Yuav ua li cas cov amino acid sequence txiav txim cov yam ntxwv ntawm ib tug kab mob?

Video: Yuav ua li cas cov amino acid sequence txiav txim cov yam ntxwv ntawm ib tug kab mob?
Video: Nkauj kab teem ua neej dai siav #4. 02.04.2018 2024, Hlis ntuj nqeg
Anonim

Cov noob yog ib ntu ntawm DNA molecule uas txiav txim cov qauv ntawm polypeptides (proteins) thiab yog li ib qho kev tshwj xeeb. Cov ib ntus ntawm nucleotides hauv DNA txiav txim tus ib ntus ntawm amino acids nyob rau hauv cov polypeptides, thiab yog li cov qauv ntawm cov proteins. Txhua tus uas yog lub luag haujlwm rau ib qho kev zoo.

Raws li, dab tsi txiav txim siab qhov amino acid sequence?

Cov ib ntus ntawm amino acids yog txiav txim siab los ntawm genetic code. Lub triplet ntawm nucleotides nyob rau hauv tRNA uas yog complementary rau lub hauv paus khub ntawm tej triplet nucleotides (codons) nyob rau hauv mRNA thaum lub sij hawm txhais lus ntawm protein synthesis. Lub molecule uas encodes genetic ntaub ntawv.

Ib qho tseem yuav nug, ua li cas cov khoom ntawm cov amino acids txiav txim siab txoj kev ntawm cov protein folds? Thaum txawv amino acids koom ua ke ua a protein ntau , qhov tshwj xeeb khoom ntawm txhua tus amino acid txiav txim li cas cov protein folds rau hauv nws qhov kawg 3D duab. Cov duab ntawm lub protein ntau ua kom nws ua tau rau ua ib qho haujlwm tshwj xeeb hauv peb cov hlwb.

Ntawm no, qhov sib lawv liag ntawm cov amino acids txiav txim siab 3d zoo li cas?

Peptide Bonds Cov ib ntus thiab tus naj npawb ntawm amino acids thaum kawg txiav txim cov protein puab , loj, thiab muaj nuj nqi. Txhua amino acid yog txuas rau lwm tus amino acid los ntawm covalent daim ntawv cog lus, hu ua peptide daim ntawv cog lus. Carboxyl pawg ntawm ib amino acid yog txuas rau lub amino pab pawg neeg tuaj amino acid.

Dab tsi hauv DNA txiav txim qhov zoo ntawm lub cev?

Gene. Ib ntu ntawm a DNA molecule (ib theem ntawm cov hauv paus) uas codes rau ib qho protein thiab txiav txim qhov zoo (phenotype) ntawm tus kheej. Ib lub noob yog lub hauv paus ntawm kev tsim noob neej nyob hauv ib lub neej kab mob.

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