Isotype (immunology)

In immunology, the "immunoglobulin isotype" refers to the type of chain. In humans, there are nine isotypes:


 * heavy chain
 * α - IgA 1, 2
 * δ - IgD
 * γ - IgG 1, 2, 3, 4
 * ε - IgE
 * μ - IgM
 * light chain
 * κ
 * λ

Immunoglobulin class switching can be used to change the class of the heavy chain, but not of the light chain.