Cartoon of the TRP protein showing its phosphorylation sites.

Circles represent TRP phosphorylation sites as revealed in this study and in [24]. White circles, sites that were predominantly phosphorylated in the light. Black circle, site that was predominantly phosphorylated in the dark. Grey circles, sites that were not light-dependently phosphorylated. Red circles, phosphorylation sites that were located on peptides that did not meet the criteria for quantification. Sites that were newly identified in this study are underscored.