The pH at which an amino acid carries no net charge is called its

Options

A. triple point
B. inversion point
C. isoelectric point
D. neutralization point

Answer

C

Explanation

The isoelectric points `(pI)` is the `pH` at which the amino acid `(A A)` exists only as a dipolar ion with zero net charge:
`H_(3) overset(+)underset("Ampholyte")(NCHRCOO^(-))`
Since dipolar are held together by means of strong electrostatic forces, an amino acid usually shows its lowest Isoelectric point can be calculated from the `pK_(a)' s`:
`pI = (pK_(a1) + pK_(a2))//2`