MR1 and cancer: A recent follow up study confirmed that the most responsive of these T cell clones from patient number 10, clone 10-59, expressed a TRAV26-1/TRAJ42 TCR that has a CDR3-α including the tyrosine-containing 10 amino–acid sequence, YGGSQGNLIF, which we describe here to mean that 2 independent laboratories have now found similar MR1-restricted, cancer-activated invariant T cells (CAITs) (46).