FIGURE 4.

UGP activity in brain samples from GALT‐null and wild‐type rats of different ages. Box and whisker plots show UGP activity measured toward gal‐1‐P in samples of brain harvested from wild‐type (+/+, white boxes) and GALT‐null (−/−, shaded boxes) rats of the indicated ages. The top and bottom of each box represent the 75th and 25th percentiles, respectively, the middle line in each box represents the median for that set, and the whiskers, if any, represent the maximum and minimum values in the data set within 1.5 interquartile range (IQR) of the upper and lower quartiles