Each antibody has $...A...$ polypeptide chains, $...B...$ small chains called $....C...$ chains and $...D...$ longer chains called $.E...$ chains

The antibody, therefore, is represented as $...F...$

Here $A$ to $F$ refers to

• A

  $A-four, B-two, C-light, D-two, E-heavy$, $F- $$H_{2} L_{2}$

• B

  $A-six, B-three, C-light, D-three, E-heavy$, $F-$ $H_{3} L_{2}$

• C

  $A-two, B-one, C-light, D-one, E-heavy$, $\mathrm{F}-\mathrm{H}_{1} L_{1}$

• D

  $A-five, B-two, C-light, D-three, E-heavy$, $\mathrm{F}-\mathrm{H}_{2} L_{2}$