Essential Biochemistry - Chemistry Of Proteins (Section 2 - No. 13)
What is the isoelectric point (pI) of a protein?
The pH at which the protein has its maximum solubility
The pH at which the protein has a net positive charge
The pH at which the protein has a net negative charge
The pH at which the protein has a net charge of zero
Explanation
The isoelectric point is the pH at which the protein has an equal number of positive and negative charges, resulting in a net charge of zero.
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