Question

Which heavy chain type is associated with IgA antibodies?

Options

• α (alpha)

• μ (mu)

• γ (gamma)

• δ (delta)

Answer 1

IgA antibodies are associated with the α (alpha) heavy chain. IgA constitutes approximately 20% of serum and is primarily found in secretions such as saliva, tears, and colostrum, where it provides protection to mucosal surfaces.