YCytosine vs Thymine
Nucleotide yog lub tsev thaiv ntawm nucleic acids xws li DNA thiab RNA. Nws yog tsim los ntawm peb yam tseem ceeb: pentose qab zib, nitrogenous puag thiab phosphate pawg. Muaj tsib qhov sib txawv nitrogenous hauv paus muaj nyob hauv nucleic acids. Lawv yog adenine, guanine, thymine, uracil, thiab cytosine. Adenine thiab guanine yog purines. Thymine, uracil thiab cytosine yog pyrimidines uas muaj ib tug heterocyclic aromatic nplhaib qauv. Qhov sib txawv tseem ceeb ntawm cytosine thiab thymine yog cytosine yog pyrimidine puag pom nyob rau hauv ob qho tib si DNA thiab RNA thiab ua ke nrog guanine los ntawm peb hydrogen bonds thaum thymine yog pyrimidine puag pom tsuas yog hauv DNA thiab khub nrog adenine los ntawm ob daim ntawv cog lus hydrogen.
YCytosine yog dab tsi?
Cytosine yog ib qho ntawm cov nitrogenous hauv paus pom hauv DNA thiab RNA. Nws yog ib tug pyrimidine derivative uas muaj ib tug heterocyclic aromatic carbon nplhaib qauv. Cov mis molecular ntawm cytosine yog C4H5N3O. Lub hauv paus ua ke ntawm cytosine yog guanine, thiab nws tsim peb daim ntawv cog lus hydrogen los ua ke nrog guanine thaum lub sij hawm ntxiv hauv paus ua khub hauv DNA helix. Cytosine muaj ob pawg txuas rau nws lub nplhaib heterocyclic. Ntawm C4 txoj haujlwm, muaj pawg amine, thiab ntawm C2 txoj haujlwm muaj keto pawg, raws li qhia hauv daim duab.
Cytosine nqa cov ntaub ntawv caj ces ntawm cov kab mob. Nws yog tam sim no nyob rau hauv DNA thiab RNA thiab koom nyob rau hauv lub genetic code ntawm cov noob. Cytosine tseem ua haujlwm sib txawv ntawm lwm lub luag haujlwm hauv cov hlwb. Nws ua raws li lub zog thauj khoom thiab cofactor cytidine triphosphate (CTP).
Daim duab 01: Cytosine Chemical Structure
Thymine yog dab tsi?
Thymine yog ib qho ntawm cov nitrogenous hauv paus pom hauv DNA. Nws yog ib tug pyrimidine derivative uas muaj ib tug heterocyclic aromatic carbon nplhaib nyob rau hauv nws cov qauv. Cov tshuaj formula ntawm thymine yog C5H6N2O2Hauv RNA, thymine hloov nrog uracil. Thymine khi nrog adenine los ntawm kev tsim ob daim ntawv cog lus hydrogen thaum lub sij hawm sib koom ua ke. Thymine muaj ob pawg keto ntawm C2 thiab C4 txoj haujlwm thiab CH 3 pawg ntawm C5 txoj haujlwm hauv nws lub nplhaib heterocyclic aromatic raws li qhia hauv daim duab 02.
Thymine yog ib feem ntawm cov kab mob caj ces ntawm cov kab mob. Txawm li cas los xij, thymine dimers yog qhov kev hloov pauv ntau tshaj plaws uas tshwm sim hauv DNA thaum raug ultraviolet hluav taws xob. Nws tshwm sim thaum ob lub hauv paus thymine nyob ib sab ntawm ib sab ntawm DNA.
Thymine tuaj yeem tsim cov derivative hu ua thymidine triphosphate (TTP) uas yog ib qho tseem ceeb nruab nrab ntawm kev hloov cov tshuaj zog hauv cov hlwb.
Daim duab 02: Thymine Chemical Structure
Qhov txawv ntawm Cytosine thiab Thymine yog dab tsi?
YCytosine vs Thymine |
|
| Cytosine yog ib qho ntawm cov nitrogenous hauv paus pom hauv DNA thiab RNA. | Thymine yog ib qho ntawm cov nitrogenous hauv paus pom tsuas yog hauv DNA. |
| tshuaj formula | |
| C4H5N3O | C5H6N2O2 |
| Base Type | |
| Cytosine yog pyrimidine puag. | Thymine yog pyrimidine puag. |
| Complementary Base | |
| Cytosine khub nrog guanine. | Thymine khub nrog adenine. |
| Tus naj npawb ntawm Hydrogen Bond Daim Ntawv | |
| Cytosine ua peb daim ntawv cog lus hydrogen nrog guanine. | Thymine ua ob daim ntawv cog lus hydrogen nrog adenine |
| qauv | |
| Cytosine muaj ib pawg amine thiab ib pawg keto. | Thymine muaj ob pawg keto thiab ib pawg methyl. |
Summary – Cytosine vs Thymine
Cytosine thiab thymine yog ob qho tseem ceeb nitrogenous hauv paus pom nyob rau hauv nucleic acids ntawm kab mob. Lawv koom nrog hauv kev nqa cov ntaub ntawv caj ces thiab lwm yam haujlwm ntawm cov hlwb. Ob lub hauv paus muaj lub nplhaib heterocyclic carbon nyob rau hauv lawv cov qauv, uas faib lawv mus rau hauv pawg pyrimidine. Cytosine muaj nyob hauv DNA thiab RNA thaum thymine tsuas muaj nyob hauv DNA. Cytosine khi nrog guanine thiab thymine khi nrog adenine los ntawm hydrogen bonds kom stabilize DNA ob helix. Cytosine ua rau peb hydrogen bonds nrog guanine thiab thymine ua ob hydrogen bonds nrog adenine thaum lub hauv paus khub. Qhov no yog qhov txawv ntawm cytosine thiab thymine.
