Day 279 has 153 protein-coding genes (browser view) including the T-cell receptor alpha and delta locus.
Along with what we saw on Day 149 (7p14.3-7p14.1): The T cell receptor gamma locus, this is the other main site where T-cells shuffle their DNA to make a diverse set of immune recetors
Click here to see all 8234132 letters of Day 279 with TRAC (T-cell receptor alpha constant) underlined.