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Newer gene family pages are available

This is our older gene family page that is no longer maintained. Please go to our new look gene family index to view a complete list of our new maintained gene families. More information can be found in our gene families help page.

We have created a mapping file (Excel) that will map most of the old families to the new. However because we have changed the way we assign families and how we organise them, this file may not map all the old families.

New Beta Site!

Please visit our new HGNC beta site and let us know what you think via the feedback form.

T cell receptors

Specialist advisors:specialist advisor

External resource: T cell receptor genes IMGT/GENE-DB HGNC approved


1. TRA locus at 14q11.2 
4.  TRD locus at 14q11.2   
TRAV (variable) genes
TRDV (variable) genes
TRAJ (joining) genes  TRDD (diversity) genes
TRAC (constant) genes
TRDJ (joining) genes
 2. TRB locus at 7q34    TRDC (constant) genes
TRBV (variable) genes
5. TRG locus at 7p14 
TRBD (diversity) genes
TRGV (variable) genes 
TRBJ (joining) genes
TRGJ (joining) genes 
TRBC (constant) genes
TRGC (constant) genes 
3. TRB orphons (not at the TRB locus)

Click on the Approved Gene Symbol to retrieve the complete gene record


1.  TRA locus at 14q11.2 

2.  TRB locus at 7q34:

3.  TRB orphons (not at the TRB locus):

4.  TRD locus at 4q11.2:

5.  TRG locus at 7p14:

This online database does not include our confidential data. If you would like to create a new gene symbol and name, the only way to confirm it as unique is by contacting us.