The N-terminal half of light chains VL and the N-terminal half of the Fab portion of the heavy chains VH of immunoglobulin molecules. The amino acid sequences in these regions are variable within a single immunoglobulin class and light chain type. This variability is controlled by the immunoglobulin genes. Similarly the N-terminal region of the a, ft and y chains of the T-lympho- cyte antigen receptors have variable regions, controlled in a similar manner,

Link to This Definition

Did you find this definition of VARIABLE REGION helpful? You can share it by copying the code below and adding it to your blog or web page.
Edited and fact checked by Pam: Google +