<prompt> Structure of antibodies is composed ofSingle peptide chainTwo peptide chainNon sulphur aminoacid2 heavy 2 light peptidie chain  <response>: It is made up of 2 heavy H chains and 2 light L chains, combined through disulfide bridges. In the case of lgG, H chains are composed of 440 amino acids and L chains made up of 214 amino acids. Depending on the heavy chain makeup, the immunoglobulins are differentiated into 5 major classes.Immunoglobulin-G lgG is made up of heavy chain g gammalgM has u mu heavy chainlgA has a alpha heavy chainlgD contains d delta lgE heavy chain is called e epsilon.Ref: D M Vasudevan 7th edition Page no: 687 