What is VN-segment?

A VN-segment, or variable number segment, refers to a specific region in the genetic structure of certain organisms, particularly in the context of immunology and genetics. It is often associated with the diversity of immune responses, as it allows for variations in the genes that encode for antibodies or T-cell receptors. The VN-segment contributes to the ability of the immune system to recognize a wide array of pathogens by generating a diverse repertoire of antigen receptors.