Qhov sib txawv tseem ceeb ntawm guanine thiab guanosine yog guanine yog nucleobase, hos guanosine yog nucleoside.
Nucleobases yog nitrogenous bases uas muaj nitrogen nyob rau hauv nws lub hauv paus daim ntawv. Cov no yog cov khoom siv lom neeg uas koom nrog hauv kev tsim cov nucleosides. Nucleosides yog glycosamine compounds. Cov tebchaw no muaj cov suab thaj thiab cov nucleobase. Nws zoo nkaus li cov nucleotide tsis muaj phosphate pawg.
Guanine yog dab tsi?
Guanine yog ib qho ntawm plaub lub ntsiab nucleobases uas tuaj yeem pom hauv DNA thiab RNA. Lwm peb nucleobases yog adenine, thymine, cytosine (hauv RNA muaj uracil es tsis yog thymine). Thaum tsim cov qauv DNA, guanine ua ke nrog cytosine. Lub nucleoside ntawm guanine (kev sib xyaw ntawm cov suab thaj nrog guanine) yog hu ua guanosine.
Cov tshuaj formula ntawm guanine yog C5H5N5O. Nws yog ib qho derivative ntawm purine. Cov qauv ntawm guanine muaj fused pyrimidine-imidazole nplhaib system uas muaj ob daim ntawv cog lus. Cov qauv no muaj ib qho kev tsis txaus ntseeg. Nws txhais tau tias lub bicyclic molecule yog planar.
Guanine tuaj yeem pom hauv DNA thiab RNA. Nws tuaj yeem khi nrog cytosine los ntawm peb daim ntawv cog lus hydrogen. Lub cytosine molecule muaj cov amino pawg uas tuaj yeem ua raws li hydrogen nyiaj pub dawb. Guanine muaj cov pab pawg carbonyl uas tuaj yeem ua raws li tus neeg txais nyiaj hydrogen.
Peb tuaj yeem rho tawm guanine los ua cov khoom uas zoo li cov khoom dawb amorphous. Thaum kub siab dua, cov khoom no decomposes tsis yog melting. Thaum nws kub kub, guanine undergoes sublimation ntawm kub kub. Tsis tas li ntawd, cov khoom no yog insoluble hauv dej. Tab sis, nws yog soluble nyob rau hauv dilute acids thiab bases. Nws yog non-flammable tab sis tuaj yeem ua rau khaus.
Nyob rau hauv lub xub ntiag ntawm cov acids muaj zog, guanine undergoes, hydrolysis tsim glycine, ammonia, carbon dioxide, thiab carbon monoxide. Raws li thawj kauj ruam, guanine undergoes deamination tsim xanthine. Feem ntau, guanine tuaj yeem ua rau hydrolysis sai dua adenine.
Guanosine yog dab tsi?
Guanosine yog ib qho nucleoside uas yog ua los ntawm guanine nucleobase thiab ribose qab zib. Txij li thaum guanine yog lub hauv paus purine, peb tuaj yeem hu ua guanosine li purine nucleoside. Kev sib cog lus ntawm ribose qab zib thiab guanine nyob rau hauv no guanosine molecule yog ib tug beta glycosidic daim ntawv cog lus, uas yog ib yam ntawm cov muaj zog covalent daim ntawv cog lus. Thaum sib ntxiv ntawm ib pab pawg phosphate, cov molecule no tuaj yeem tsim cov nucleotide guanosine monophosphate. Cov tshuaj tiv thaiv ntxiv no yog hu ua phosphorylation. Cov guanosine molecule muaj cov ntawv thov tseem ceeb hauv cov kab mob lom, suav nrog kev sib txuas ntawm DNA thiab RNA, kev sib txuas ntawm cov protein, koom nrog cov txheej txheem photosynthesis, muaj txiaj ntsig zoo hauv cov leeg nqaij hauv peb lub cev, thiab lwm yam.
Cov tshuaj formula ntawm cov tshuaj no yog C10H13N5O5. Peb tuaj yeem muab rho tawm los ua ib yam khoom uas muaj qhov zoo li dawb crystalline hmoov. Cov tshuaj no tsis muaj ntxhiab, tab sis muaj ib tug me me saline saj. Thaum nws melting point, guanosine undergoes decomposition. Nws yog soluble hauv acetic acid tab sis me ntsis soluble hauv dej. Txawm li cas los xij, qhov sib xyaw no yog insoluble hauv ethanol, diethyl ether, benzene thiab chloroform.
Qhov txawv ntawm Guanine thiab Guanosine yog dab tsi?
Qhov sib txawv tseem ceeb ntawm guanine thiab guanosine yog guanine yog nucleobase, hos guanosine yog nucleoside. Ntxiv mus, guanine yog dawb amorphous khoom, thaum guanosine yog dawb crystalline hmoov.
Dhau li, qhov sib txawv ntawm guanine thiab guanosine yog tias guanine muaj fused pyrimidine-imidazole ring system nrog conjugated ob daim ntawv cog lus thaum lub guanosine muaj ribose qab zib txuas nrog guanine.
Hauv qab infographic qhia ntau cov ntsiab lus ntawm qhov sib txawv ntawm guanine thiab guanosine.
Summary – Guanine vs Guanosine
Nucleotides yog qhov rov ua dua tshiab hauv DNA qauv. Lub nucleotide muaj cov suab thaj, nucleobase thiab phosphate pawg. Kev sib xyaw ntawm cov suab thaj thiab cov nucleobase yog hu ua nucleoside. Qhov sib txawv tseem ceeb ntawm guanine thiab guanosine yog guanine yog nucleobase, hos guanosine yog nucleoside.
