NCIt definition : Immunoglobulin Light Chain Kappa is one of two Ig light chain types. Each Ig molecule
is typically composed of two heavy chains and two light chains. Ig kappa light chains
contain a variable and a constant region. Kappa light chains are encoded by multiple
V, J, and C gene segments, which are separated in the genomes of cells undifferentiated
with regard to antibody gene expression. Diversity in the kappa light chain V region
arises during differentiation of an activated (kappa-type) antibody-producing B-cell
from variable recombination of kappa V genes with kappa J genes and somatic point
mutation, which plays a major role in antibody diversity. (from OMIM and NCI);