Structure of antibodies is composed of -: (A) Single peptide chain, (B) Two peptide chain, (C) Non sulphur amino acid, (D) 2 long and 2 sho peptide chains
Answer is D. Antibody or immunoglobulin are glycoproteins molecules consisting of four polypeptide chains. - two identical heavy chains ( H) , molecular weight > 50 kDa. - two identical light chains (L), molecular weight > 25kDa. - the heavy chains are of five types called alpha, gamma, delta , epsilon and mu. - light chains are similar in all class of immunoglobulins. Reference : Anathanarayan & paniker's 9th edition, pg no: 94 <\p>