Expression of UVR8W285A in transgenic plants. (A) UVR8 and UVR8W285A protein levels in two transgenic UVR8W285A lines with low levels of overexpression (W285A #4 and #24), in two transgenic UVR8W285A lines with high levels of overexpression (W285A #3 and #12), in the wild-type line (Ws), in a control line overexpressing UVR8 (UVR8-Ox), and in the cop1-19 mutant line. (B) Quantification of UVR8 and UVR8W285A protein levels in biological triplicates, relative to the wild type (Ws) UVR8 level; error bars represent SD.