The isoelectric point is define as the pH t which there is no net charge.
If the carbonyl group has pKa = 2 and the protonated amino group pKa = 9 the amino acid will exist as a zwitteron in solutions with pH between 2 and 9, right? A zwitteron has no net charge, right? So why is it called the isoelectric point, and not the isoelectric region?
If the carbonyl group has pKa = 2 and the protonated amino group pKa = 9 the amino acid will exist as a zwitteron in solutions with pH between 2 and 9, right? A zwitteron has no net charge, right? So why is it called the isoelectric point, and not the isoelectric region?