Scatter plot of tag abundance distributions in the forelimb and hindlimb. Note the log scale. Each point represents a tag with a given frequency in the forelimb (X-axis) and hindlimb (Y-axis). The number at each point indicates the number of unique tags with a given frequency. (Dashed and solid lines) 0.05 and 0.01 P values for probability of differential expression, respectively. Tags falling outside these lines are differentially expressed according to the test statistic developed by Audic and Claverie (1997). Seventy SAGE tags fall outside the 1% confidence interval and 317 SAGE tags fall outside the 5% confidence interval. (Dotted line) Equal expression in the forelimb and hindlimb. Zero is plotted as 0.5 to be observed on a log scale.
