Figure 1.

Evolutionary conservation of phosphorylated Ser and Thr residues in EAR motifs of IAA9, BEH4 and DEAR4. The EAR motif and adjacent residues of orthologues and paralogues of Arabidopsis IAA9 (A), BEH4 (B) and DEAR4 (C) from papaya (Cp), poplar (Pt), rice (Os), sorghum (Sb) and grapevine (Vv) are represented. The phosphorylated peptide sequences (shown at the top of each alignment) are annotated using the modification nomenclature outlined in the publication guidelines of Molecular & Cellular Proteomics. An experimentally confirmed phosphorylation site is indicated in boldface letters with a lowercase p and is contained in parentheses: (pS). pSt sites wherein which residue(s) within the peptide is phosphorylated but remains ambiguous are presented as boldface lowercase letters, and each potential candidate (not necessarily all S and T residues) is contained in parentheses: (s) or (t). The sequence of the core EAR motif site is underlined.