<prompt> True about immunoglobulins -IgE has minimum concentrationIgG has minimum concentrationIgA has minimum concentrationIgM has minimum concentration  <response>: 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 