Which of the following immunoglobulin is responsible for opsonisation -: (A) Ig A, (B) Ig G, (C) Ig M, (D) Ig E
Answer is C. The unique structural features of IgM appear paicularly suited to the biological role of providing protection against microorganism and other large antigens that have repeating antigenic determinants on their surface. - IgM is also 500-1000 times more effective than IgG in opsonization, 100 times more effective in bactericidal action and about 20 times in bacterial agglutination. Reference : Anathanarayan & paniker's 9th edition, pg no:98 <\p>