What the papers say: Keeping it in the family: How T cells make antigen receptors

The last year has unveiled extensive information on the T‐cell antigen receptor genes. For both the α‐ and β‐chains of this molecule, it is clear that an expressed gene is compiled from several coding sequences dispersed along the chromosome. During T‐cell development, recombination events occur which create a single transcription unit from these dispersed elements. Such gene organization shows that the T‐cell receptor has close evolutionary links with immunoglobulins. Both types of molecule use the same genetic mechanisms to create the diversity necessary for antigen recognition.