Qhov sib txawv tseem ceeb ntawm kev tsis pom tseeb thiab kev tsis sib haum xeeb yog qhov kev cai caj ces yog cov cai tsis meej vim tias ib qho codon ib txwm ua rau tib cov amino acid, thaum cov cai caj ces yog tus lej degenerate vim tias ib qho amino acid yuav raug teev los ntawm ntau tshaj. ib codon.
Cov noob yog cov txheej txheem ntawm kev hloov pauv. Muaj qhov tseeb nucleotide ib ntus hauv cov noob, uas yog lub npe hu ua genetic code. Nws yog lub luag haujlwm rau qhov raug txiav txim ntawm cov amino acid ib ntus ntawm cov protein. Muaj plaub hom hauv paus hauv DNA. Thaum cov txheej txheem caj ces muab faib ua pawg ntawm peb lub hauv paus (triples), ib qho triplet hu ua codon. Muaj 64 qhov sib txawv triplets lossis codons. Tawm ntawm 64 codons, peb codons nres codons uas tsis code rau amino acids. Qhov seem 61 codons code rau 20 txawv amino acids. Txhua codon ib txwm qhia ib qho tshwj xeeb amino acid. Li no, peb hais tias cov noob caj noob ces yog unambiguous. Ntxiv mus, ib qho amino acid tuaj yeem raug coded los ntawm ntau tshaj ib codon. Piv txwv li, cov amino acid serine yog coded los ntawm 6 codons: UCU, UCC, UCA, UCG, AGU thiab AGC. Yog li ntawd, peb hais tias cov noob caj noob ces yog degenerate.
Dab tsi yog Code Unambiguous?
Cov kab mob caj ces tsis meej vim tias ib qho triplet lossis codon ib txwm sau rau cov amino acid tshwj xeeb. Nws tsis code rau lwm cov amino acid. Piv txwv li, codon GGA tsuas yog cov lej rau glycine. Nws tsis code rau lwm cov amino acids. Ib yam li ntawd, tag nrho lwm cov codons code tsuas yog rau nws cov amino acid tshwj xeeb.
Daim duab 01: Codon Table
Ib codon tsis code rau ob lossis ntau dua amino acids. Qhov sib txawv ntawm ib lub hauv paus los yog nucleotide (qhov taw tes hloov pauv) hauv codon tuaj yeem ua rau muaj cov amino acid sib txawv. Nws tuaj yeem ua rau muaj txiaj ntsig zoo, lossis nws tuaj yeem tsim cov protein tsis ua haujlwm.
Dab tsi yog Degenerate Code?
Tus kab mob caj ces yog degenerate. Ntau tshaj ib codon tuaj yeem sau rau cov amino acid tshwj xeeb. Hauv lwm lo lus, ib qho amino acid tshwj xeeb tuaj yeem nkag los ntawm ntau dua ib qho nucleotide triplet. Ua piv txwv, rau qhov sib txawv codons UCU, UCC, UCA, UCG, AGU thiab AGC code rau ib qho amino acid hu ua serine.
Daim duab 02: Degenerate Code
Lwm qhov piv txwv yog phenylalanine, uas muaj ob codons. Lawv yog UUU thiab UUC. Ntxiv mus, glycine yog coded los ntawm plaub codons thiab lysine yog coded los ntawm ob codons. Feem ntau, ib qho amino acid yuav raug encoded los ntawm 1 mus rau 6 txawv triplet codes. Txij li txoj cai caj ces muaj peev xwm, peb hais tias txoj cai caj ces yog degenerate.
Dab tsi yog qhov zoo sib xws ntawm Unambiguous thiab Degenerate Code?
- Tus kab mob caj ces tsis meej thiab degenerate.
- Ib codon muaj ib qho kev txiav txim ntawm peb nucleotides.
- Muaj 64 codons thiab 20 amino acids.
Dab tsi yog qhov txawv ntawm Kev Tsis Pom Zoo thiab Degenerate Code?
Nyob rau hauv unambiguous code, ib codon codes tsuas yog ib tug amino acid. Nyob rau hauv degenerate code, ntau tshaj ib codon yuav coded rau ib tug tshwj xeeb amino acid. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm qhov tsis paub meej thiab degenerate code. Txoj cai genetic code ntawm tag nrho cov kab mob yog unambiguous thiab degenerate.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm qhov tsis meej thiab degenerate code.
Summary – Unambiguous vs Degenerate Code
Peb nucleotides qhia txhua tus amino acid. Feem ntau, cov kev cai genetic code ntawm txhua tus noob yog unambiguous thiab degenerate. Nyob rau hauv unambiguous code, txhua codon qhia tsuas yog ib tug amino acid. Hauv degenerate code, ib qho amino acid yuav raug teev los ntawm ntau tshaj ib codon. Yog li ntawd, ib qho amino acid tau muab encoded los ntawm ntau tshaj ib tug nucleotide triplet. Yog li, qhov no qhia txog qhov sib txawv ntawm qhov tsis meej thiab degenerate code.
