REL2 is part of a small family of transcriptional corepressor proteins. A, Phylogenetic analysis of the TPL/REL2 family. In blue and gray are highlighted the REL2 and TPL clades, respectively. Pp, Physcomitrella; Mp, Marchantia; Sb, Sorghum bicolor; Os, rice; SI, tomato; GSVIV, grape; At, Arabidopsis thaliana; GRMZM maize. B, RNA-seq expression levels of REL2 and RELK genes in different tissues, from Walley et al. (2016).