Table 1.

Serine residues in the ACA8 N-terminus that have been found to be phosphorylated in vivo

Phosphorylated residue	Plant material	Effectors	Reference
Ser19	Cultured cells		Nühse et al. (2003, 2004)
Ser22	Cultured cells	Sucrose (–)	Nühse et al. (2003, 2004); Niittyla et al. (2007);Sugiyama et al. (2008); Nakagami et al. (2010)
Ser27	Cultured cells, seedlings, shoots, leaves	Abscisic acid (+), flagellin 22 (+)	Nühse et al. (2003, 2004, 2007); Benschop et al. (2007); Sugiyama et al. (2008); Whiteman et al. (2008); Jones et al. (2009); Reiland et al. (2009); Chen et al. (2010); Nakagami et al. (2010)
Ser29	Cultured cells	Abscisic acid (+), gibberellins (+)	Nühse et al. (2003, 2004); Sugiyama et al. (2008); Chen et al. (2010); Nakagami et al. (2010)
Ser57	Cultured cells		Sugiyama et al. (2008); Nakagami et al. (2010)
Ser99	Cultured cells	Flagellin 22 (+)	Benschop et al. (2007)