Expected and unexpected evolution of plant RNA editing factors CLB19, CRR28 and RARE1: retention of CLB19 despite a phylogenetically deep loss of its two known editing targets in Poaceae.

Extending the scope of studies on plant organelle RNA editing to further taxa and additional nuclear cofactors reveals expected evolutionary transitions, strikingly different evolutionary dynamics for multiple-target editing factors like CLB19 and CRR28 and suggests additional functions for editing factor CLB19 among the Poaceae.