Which of the immunoglobulin has Maximum half-life-: (A) Ig G, (B) Ig A, (C) Ig M, (D) Ig E
Answer is A. Serum Half-life: IgG (G1, G2, and G4): 23 days (maximum) and Subclass 3 has half-life of 8 days. IgA: 06 days IgM: 05 days IgD: 03 days IgE:2.5 days (minimum)