What does phosphorylation do to a pl of amino acid? 1. The pl value is not changed. 2. pl is increased. 3. pl is decreased.
Explanation:
Each amino acid has a specific pI value i.e the isoelectric point of that amino acid. It is the point at which the amino acid has no net electrical charge i.e is in its zwitter ionic form(all positive and negative charges of the amino acid side chai functional groups cancel out each other). pI value is an important characteristic for any amino acid, because every amino acid has at least two titrable groups, one acid an one base and along with it they have a side chain that has different functional groups, all owing to the net charge of that amino acid.
The pI value is the average of the 2 pKa values of one form(protonated) before and one(deprotonated) after the zwitter ion form of 0 charge. the pKa values in turn depend on the functional group acidity and the stability of the conjugate base is the main factor there that decides the acidity(pKa) of the molecule.
Effect of phosphorylation:
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