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Shkiper50 [21]
4 years ago
5

Why does the charge on a protein vary with change in PH

Biology
1 answer:
RideAnS [48]4 years ago
6 0
As the pH of a solution increases, deprotonation of the acidic and basic groups on proteins occur,
so that carboxyl groups are converted to carboxylate anions (R-COOH to R-COO-) and ammonium groups are converted to amino groups (R-NH3+<span> to R-NH</span>2<span>).
In proteins the iso-electric point (pI) is defined as the pH at which a protein has no net charge.
When the pH > pI, a protein has a net negative charge and when the pH < pI, a protein has a net positive charge.
The pI varies for different proteins.</span>
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