True about immunoglobulins -: (A) IgE has minimum concentration, (B) IgG has minimum concentration, (C) IgA has minimum concentration, (D) IgM has minimum concentration
Answer is A. Of IgE is typically the least abundant isotype--blood serum IgE levels in a normal individual are only 0.05% of the Ig concentration Ref: Ananthanarayan & Panikers textbook of microbiology 9th edition pf:98