pKa-an kev sib raug zoo. Nws yog qhov tsis zoo logarithm ntawm qhov sib piv ntawm dissociated acid thiab conjugated puag, tshaj qhov concentration ntawm cov tshuaj txuam. pI-hu ua "isoelectric point," qhov no yog pH uas lub molecule muaj tus nqi nruab nrab.
Puas isoelectric point tib yam li pH?
Lub ntsiab lus isoelectric txhais tau tias yog pH uas tsis muaj kev tsiv teb tsaws chaw nyob rau hauv qhov chaw hluav taws xob, thaum lub ntsiab lus isoionic txhais tau tias yog pH uas tsis muaj nuj nqis ntawm cov molecule. Hauv cov tshuaj deionized, cov ntsiab lus isoelectric thiab isoionic yog rau feem ntau lub hom phiaj zoo ib yam.
pKa txhais li cas rau cov amino acids?
Tus nqi pKa muab rau cov amino pawg ntawm cov amino acid tshwj xeeb yog hais txog qhov sib npaug ntawm cov protonated zoo nitrogen thiab deprotonated nruab nrab nitrogen.
YPuas isoelectric point acidic?
Lub isoelectric point (pI) yog pH tus nqi uas lub molecule nqa tsis tau hluav taws xob. Tus nqi pI tuaj yeem siv los qhia txog lub ntiaj teb cov ntsiab lus lossis cov kua qaub ntawm lub zwitterionic molecule, thiab cov tebchaw nrog pI > 7 tuaj yeem suav tias yog qhov yooj yim, thiab covnrog pI < 7 tuaj yeem suav tias yog acidic. …
Dab tsi cuam tshuam rau isoelectric point?
Lub ntsiab lus isoelectric (pI) yog pH uas ib qho molecule nqa tsis tau cov nqi hluav taws xob. Tus nqi net ntawm cov molecule raug cuam tshuam los ntawm pH ntawmnws ib puag ncig ib puag ncig thiab tuaj yeem ua qhov zoo lossis qhov tsis zoo vim qhov nce lossis poob ntawm protons, feem.
