What will be the isoelectric point (pI), if pK1=5.4 and pK2= 7.6?

6.4 6.5 6.8 6.9

6.5

Isoelectric point (pI)= \(\frac{1}{2}\){pK1 + pK2}                               =\(\frac{1}{2}\){5.4 +7.6}                               =\(\frac{1}{2}\){13}                               =6.5