Quantification of membrane-bound FGF2-GFP before (0.15 0.06 m - 2 ) and after UV illumination (0.75 0.4 m - 2 ) ( n = 2 and n = 16, respectively). Significance was tested using two-tailed paired sample sign testing (*** P = 10 -5 ). Data presented as mean s.d. N denotes the number of biological replicates, n the number of cells. Center line in the box plot represents the median, the box represents 25–75% of the data, whiskers represent 1.5 interquartile range and the square box among data points represents the mean.
