Video: Dab tsi yog isoelectric point hauv chemistry?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov isoelectric taw tes (pI, pH (I), IEP), yog pH uas lub molecule nqa tsis tau hluav taws xob net los yog hluav taws xob nruab nrab nyob rau hauv qhov kev txheeb cais. Tus qauv nomenclature los sawv cev rau isoelectric point yog pH (I), txawm hais tias pI feem ntau pom, thiab siv rau hauv kab lus no rau brevity.
Ntxiv mus, lub ntsiab lus ntawm isoelectric point yog dab tsi?
Isoelectronic taw tes , pI The isoelectronic taw tes lub isoionic taw tes yog pH uas cov amino acid tsis tsiv mus nyob rau hauv hluav taws xob teb. Qhov no txhais tau tias nws yog pH uas cov amino acid yog nruab nrab, piv txwv li daim ntawv zwitterion yog dominant. ib table pKa thiab pI qhov tseem ceeb tuaj yeem pom nyob rau nplooj ntawv tom ntej.
Tsis tas li ntawd, yuav ua li cas tshwm sim ntawm lub isoelectric point? Cov isoelectric taw tes ( pI ) yog pH ntawm kev daws teeb meem uas tus nqi ntawm cov protein ua xoom. Ib yam li ntawd, ntawm qhov kev daws teeb meem pH uas yog qis dua pI ib , qhov chaw ntawm cov protein yog feem ntau zoo them, thiab repulsion ntawm cov proteins tshwm sim.
Ib tug kuj yuav nug, dab tsi yog txhais los ntawm isoelectric point nws qhov tseem ceeb yog dab tsi?
Isoelectric Point . Qhov isoelectric point (pI) yog cov pH nqi ntawm qhov cov molecule nqa tsis tau hluav taws xob. Cov lub tswvyim tshwj xeeb tseem ceeb rau zwitterionic molecules xws li amino acids, peptides, thiab cov protein. Qhov no tuaj yeem txuas ntxiv rau lub ntsiab lus ntawm pI ntawm peptides thiab cov protein.
Vim li cas cov protein tsis zoo them?
A protein ntau yog tsim los ntawm kev sib xyaw ntawm cov acidic, yooj yim (polar) thiab nruab nrab (tsis-polar) amino acids. Yog li, yog tias protein ntau muaj ntau ntawm cov amino acids yooj yim nws yuav zoo them nyiaj thiab yog tias nws muaj ntau ntawm cov kua qaub amino acids nws yuav yog tsis zoo nqi.
Pom zoo:
Dab tsi yog isoelectric point ntawm glutamate?
PK thiab pl Tus nqi ntawm Amino Acids Lub npe pK pI ntawm 25 ° C Cysteine 1.71 5.02 Glutamic Acid 2.19 3.08 Glutamine 2.17 5.65 Glycine 2.34 6.06
Dab tsi yog qhov chemistry ntawm antacids?
Antacids. Kev npaj Antacid feem ntau yog tsim los ntawm txhuas thiab magnesium hydroxides. Qee tus ntawm lawv muab cov txiaj ntsig zoo Al (OH) 3 thiab cov nyhuv nrawm ntawm NaHCO3. Ntxiv rau sodium bicarbonate, calcium carbonate thiab qee yam silicates thiab phosphates tuaj yeem siv tau
Kev kuaj ntshav chemistry qhia dab tsi?
Kev kuaj ntshav chemistry yog cov kev kuaj ntshav uas ntsuas cov tshuaj muaj pes tsawg leeg hauv cov qauv ntshav. Lawv qhia tias qee lub cev ua haujlwm zoo npaum li cas thiab tuaj yeem pab nrhiav qhov txawv txav. Lawv ntsuas cov tshuaj xws li enzymes, electrolytes, rog (tseem hu ua lipids), cov tshuaj hormones, suab thaj, proteins, vitamins thiab minerals
Dab tsi yog txhais los ntawm isoelectric point dab tsi yog nws qhov tseem ceeb?
Isoelectric Point. Lub isoelectric point (pI) yog tus nqi pH uas lub molecule nqa tsis tau hluav taws xob. Lub tswv yim tseem ceeb tshwj xeeb rau zwitterionic molecules xws li amino acids, peptides, thiab cov protein. Qhov no tuaj yeem txuas ntxiv mus rau lub ntsiab lus ntawm pI ntawm peptides thiab cov protein
Koj pom li cas isoelectric point?
VIDEO Ua raws li qhov xav tau, qhov taw tes isoelectric lossis pI tshwm sim li cas? Cov isoelectric taw tes ( pI ib ) yog pH ntawm qhov kev daws teeb meem uas cov nuj nqis ntawm cov protein ua xoom. Thaum daws pH uas yog saum toj no pI ib , saum npoo ntawm cov protein feem ntau tsis zoo them, thiab yog li ntawd zoo li them nqi molecules yuav nthuav tawm quab yuam quab yuam.