Identification of T cell clones without the need for sequencing.

The brainbow recombination fluorescent protein system has been used for a multitude of applications in fate and lineage tracking. Here, we use a mouse with a ubiquitously expressed brainbow construct, termed the Confetti mouse, to perform T lymphocyte cell lineage tracking. We demonstrate that antigen-specific T lymphocyte clonotypes can be identified and phenotyped using flow cytometry instead of performing expensive and time-consuming methods of single cell sequencing.