BBX21D75A bbx21-1 transgenic seedlings are hyposensitive to light. Hypocotyl length and phenotype of 4-d-old Col, bbx21-1, BBX21, and various mutated BBX21 transgenic seedlings grown in W (33.3 μmol/m2/s; A and B), B (0.62 μmol/m2/s; C and D), R (6.78 μmol/m2/s; E and F), and FR (1.46 μmol/m2/s; G and H) conditions. Data are means ± se; n ≥ 20. Letters above the bars indicate significant differences (P < 0.05) as determined by one-way ANOVA with Tukey’s post hoc analysis. The experiments were performed three times with similar results. The graphs depict one of these experiments.