Hiltunen H, Illarionov B, Hedtke B, Fischer M, Grimm B. Arabidopsis RIBA proteins: two out of three isoforms have lost their bifunctional activity in riboflavin biosynthesis. Int J Mol Sci. 2012;13:14086-105 pubmed publisher
..Phylogenetic analyses imply that the monofunctional, bipartite RIBA3 proteins, which have lost DHBPS activity, evolved early in tracheophyte evolution. ..