REL and diffuse large B-cell lymphoma: Moreover, nuclear c-Rel positivity coincided with significantly upregulated TP53 transcription in ABC-DLBCL with MUT-p53 (Fig. 4A), whereas significantly upregulated TP63 and p63 protein levels in ABC-DLBCL with WT-p53 (Fig. 4B, Supplementary Fig. S5A).