TES and lymphoma: For example, the proportion of Testin positive and negative lymphomas isolated from Trp53-Δ122 was significantly different when compared to either homozygous Trp53-null (Group 1, P = 0.013) or homozygous Trp53-mΔpro (Group 2, P = 0.0044) mice, but not when compared to the small number of heterozygousTrp53-mΔpro/Trp53-Δ122 mice (Group 3, P = 0.7).