Question

In what direction (toward the anode, toward the cathode, or toward neither) will the following  proteins move in an electric field? 

a. Serum albumin (pI=4.9) at pH 8.0 

b. Urease (pI=5.0) at pH3.0 and pH 9.0 

c. Ribonuclease (pI=9.5) at pH 4.5, 9.5 and 11.0 

d. Pepsin (pI=1.0) at pH 3.5, pH7.0 and pH 9.5

Answer 1

a) Cathode

b) Cathode

c) neither

d) anode