The number of members varies in some tomato and Arabidopsis RLK subfamilies. The distribution profile of tomato and Arabidopsis RLKs in subfamilies (gray bar) and the estimated number of RLK in their common ancestral (black bar) are presented. Almost all RLK subfamilies described in Arabidopsis have representatives in tomato.
Sakamoto et al. BMC Plant Biology 2012 12:229 doi:10.1186/1471-2229-12-229