Arabidopsis Proteins CEP Journal Article Research Support, Non-U.S. Gov't 142M471B3J AT2G23440 protein, Arabidopsis Amino acid catabolism CEPR1 CEPR1 protein, Arabidopsis Carbon Dioxide Intercellular Signaling Peptides and Proteins N762921K75 Nitrogen Peptides Plant Growth Regulators Receptors, Peptide TOR carbon limitation cell cycle environmental regulation lateral root formation nitrogen limitation peptide hormone primary root growth root development small signalling peptide.