Qhov sib txawv tseem ceeb ntawm phosphodiester daim ntawv cog lus thiab phosphoester daim ntawv cog lus yog tias phosphodiester daim ntawv cog lus thaum cov piam thaj molecule khi nrog ib pawg phosphate thiab ib pab pawg hydroxyl whereas phosphoester bond tsim thaum cov piam thaj molecule khi nrog ib pawg phosphate.
Phosphoester thiab phosphodiester bonds yog muaj nyob rau hauv biochemical molecules. Phosphodiester bond yog kev sib txuas ntawm monosaccharides hauv carbohydrate molecules.
Phosphodiester Bond yog dab tsi?
Phosphodiester daim ntawv cog lus yog ib daim ntawv cog lus biochemical uas tsim thaum ob pawg hydroxyl hauv phosphoric acid reacts nrog hydroxyl pawg ntawm lwm cov molecule los tsim ob daim ntawv cog lus ester. Cov lus ua ntej "-di-" nyob rau hauv lo lus no hais txog "ob" yog li, nws qhia tias hom tshuaj lom neeg no muaj ob qhov sib txuas ntawm ester ib phosphodiester daim ntawv cog lus.
Peb tuaj yeem hais tias phosphodiester bonds yog qhov tseem ceeb rau tag nrho lub neej hauv ntiaj teb vim tias cov nyiaj no ua rau cov pob txha ntawm nucleic acid strands xws li DNA thiab RNA. Nyob rau hauv cov DNA thiab RNA molecules, phosphodiester daim ntawv cog lus yog kev sib txuas ntawm peb carbon atom ntawm ib tug qab zib molecule thiab lub thib tsib carbon atom ntawm ib tug qab zib molecule. Hauv DNA molecules, deoxyribose yog cov piam thaj molecule thaum nyob hauv RNA, nws yog ribose qab zib. Ntawm no, daim ntawv cog lus muaj zog ntawm cov phosphate pawg thiab cov piam thaj molecules tshaj ob daim ntawv cog lus ester.
Daim duab 01: Phosphodiester Bonds Ntawm Qab Zib Molecules
Thaum tsim ib daim ntawv cog lus phosphodiester los koom nrog cov nucleotides nrog rau ib leeg, tri-phosphate lossis di-phosphate molecules ntawm nucleotide tsev blocks raug rhuav tshem, muab lub zog uas yuav tsum tau tsav lub enzyme-catalyzed. tshuaj tiv thaiv. Ntawm no, phosphodiester daim ntawv cog lus tsim thaum ib qho phosphate lossis ob phosphates tawg, ua rau cov tshuaj tiv thaiv tshuaj.
Phosphoester Bond yog dab tsi?
Ib daim ntawv cog lus phosphoester yog ib hom tshuaj tiv thaiv uas tsim thaum cov piam thaj molecule khi nrog pawg phosphate. Cov txiaj ntsig tau tshwm sim ntawm O-C atoms vim tias pawg hydroxyl ntawm pawg phosphate thiab qab zib molecule react nrog ib leeg los ntawm transesterification. Ntawm no, OH- pawg los ntawm cov piam thaj molecule tsuas yog tawm ntawm oxygen atom, tso hydrogen atom, thiab nws yog oxygen atom ntawm -P-O-C- daim ntawv cog lus.
Qhov txawv ntawm Phosphodiester Bond thiab Phosphoester Bond yog dab tsi?
Phosphoester thiab phosphodiester bonds yog muaj nyob rau hauv biochemical molecules. Phosphodiester bond yog kev sib txuas ntawm monosaccharides hauv carbohydrate molecules. Phosphodiester daim ntawv cog lus yog ib daim ntawv cog lus biochemical uas tsim thaum ob pawg hydroxyl nyob rau hauv phosphoric acid reacts nrog hydroxyl pawg ntawm lwm cov molecule los tsim ob daim ntawv cog lus ester thaum lub phosphoester daim ntawv cog lus yog ib hom tshuaj tiv thaiv uas tsim thaum muaj suab thaj molecule khi. nrog ib pab pawg phosphate. Yog li ntawd, qhov sib txawv tseem ceeb ntawm phosphodiester daim ntawv cog lus thiab phosphoester daim ntawv cog lus yog tias phosphodiester daim ntawv cog lus thaum cov piam thaj molecule khi nrog ib pab pawg phosphate thiab ib pab pawg hydroxyl whereas phosphoester bond tsim thaum cov piam thaj molecule khi nrog ib pawg phosphate.
Cov lus qhia hauv qab no qhia txog qhov sib txawv ntawm phosphodiester daim ntawv cog lus thiab phosphoester daim ntawv cog lus hauv daim ntawv teev npe.
Summary – Phosphodiester Bond vs Phosphoester Bond
Phosphoester thiab phosphodiester bonds yog muaj nyob rau hauv biochemical molecules. Phosphodiester bond yog kev sib txuas ntawm monosaccharides hauv carbohydrate molecules. Qhov sib txawv tseem ceeb ntawm phosphodiester daim ntawv cog lus thiab phosphoester daim ntawv cog lus yog tias phosphodiester daim ntawv cog lus thaum cov piam thaj molecule khi nrog ib pab pawg phosphate thiab ib pab pawg hydroxyl thaum phosphoester daim ntawv cog lus thaum cov piam thaj molecule khi nrog ib pab pawg phosphate.
