Chemistry — Amino Acids & Isoelectric Point
Zwitterions and the isoelectric point of an amino acid.
Rendering…
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\text{low pH: } -\text{NH}_3^+,\ -\text{COOH}
\text{high pH: } -\text{NH}_2,\ -\text{COO}^-
pI = \frac{pK_{a1} + pK_{a2}}{2}
\text{net charge} = 0\ \text{at } pI