A mixture contains three amino acids A (pH = 3.2), B (pH = 5.7) and C (pH = 9.7).
When it is subjected to electrophoresis at pH 7 .7 , in which direction will each component of the mixture move?

• A

  A to anode, B and C to cathode

• B

  A to anode, B no movement, C to cathode

• C

  A and B to anode and C to cathode

• D

  A to cathode, B no movement, C to anode