Video: Koj xam pKa los ntawm pI li cas?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
VIDEO
Ib yam li ntawd, koj tuaj yeem nug, qhov kev sib raug zoo ntawm pKa thiab pI qhov tseem ceeb hauv cov protein yog dab tsi?
Cov pI ntawm a protein ntau yog txiav txim los ntawm tag nrho cov pH (thiab yog li ntawd pKa ) ntawm txhua qhov amino acid hauv protein ntau saw. Txhua amino acid muaj nws tus kheej pKa (and pI ), tab sis tuaj yeem sib txawv raws li pes tsawg lwm cov amino acids nyob ib puag ncig koj lub hom phiaj amino acid.
Ib qho ntxiv, pKa txhais li cas? Cov ntsiab lus tseem ceeb: pKa txhais Cov pKa tus nqi yog ib txoj kev siv rau qhia lub zog ntawm ib tug acid. pKa yog lub cav tsis zoo ntawm cov kua qaub dissociation tas li lossis Ka tus nqi. Ib qho qis dua pKa tus nqi qhia tias muaj zog acid. Ntawd yog, tus nqi qis qhia tias cov kua qaub ntau dua sib cais hauv dej.
Ua raws li qhov no, qhov P hauv pKa sawv cev rau dab tsi?
" P "hauv Ph yog lub npe luv rau "lub zog ntawm hydronium ion". Qhov twg raws li Ka nqi yog tus nqi siv los piav txog qhov nyiam ntawm cov tebchaw lossis ions kom sib cais. Tus nqi yog tseem hu ua qhov kev sib cais tsis tu ncua, qhov ionisation tsis tu ncua, thiab cov kua qaub tas li. PKa yog tsuas yog qhov tsis zoo Log ntawm Ka tus nqi.
PI qhia koj li cas txog cov protein?
Isoelectric taw tes , kuj hu ua pI ntawm protein ntau , yog pH uas tus nqi ntawm tus nqi protein ntau yog xoom. Isoelectric taw tes ( pI ): PH uas tus nqi them rau ntawm protein ntau yog xoom. Rau a protein ntau nrog ntau cov amino acids yooj yim, cov p kuv ua siab, thaum rau acidic protein ntau cov p ces qis dua.
Pom zoo:
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