<prompt> An IgG2 molecule is composed of?One gamma1 chain and two kappa chainsTwo gamma1 chains and one kappa and one lambda chainTwo gamma1 chains and two kappa chainsTwo gamma2 chains and two kappa chains  <response>: A single antibody molecule is made up of two heavy and two light chains As a rule both heavy and both light chains are identical IgG2 has two gamma2 heavy chains and two light chains both kappa or both lambda. 