Tags: Protein.
The basic structure of immunoglobulin (Ig) molecules is a tetramer of two light chains and two heavy chains linked by disulphide bonds. There are two types of light chains: kappa and lambda each composed of a constant domain (CL) and a variable domain (VL). There are five types of heavy chains: alpha delta epsilon gamma and mu all consisting of a variable domain (VH) and three (in alpha delta and gamma) or four (in epsilon and mu) constant domains (CH1 to CH4).