HbA2 has
High-Yield Explanation
HbA2 contains 2 alpha and 2 delta chains.Adult Hb referred 5as HbA contains 2 alpha and 2 beta chains.Foetal Hb ie HbF contains 2 alpha and 2 gamma chains.Ref: Textbook of medical physiology by N Geetha, 2nd edition, page no. 74