These mice are hemizygous for the TRP-1 transgene Tg(Tcra,Tcrb)9Rest, homozygous for the targeted mutation Rag1 tm1Mom and homozygous for the white based brown ... https://www.jax.org/strain/008684
Mice homozygous for the Rag1 tm1Mom mutation produce no mature T cells or B cells. Their phenotype can be described as a "non-leaky" https://www.jax.org/strain/002216