(A) Numbers of sequenced tags and different tags for each library. (B) Scatter plot showing a comparative expression level of tags between P0 WT and TrkA mutant. The occurrence of each tag was plotted on a logarithmic scale (tags with no expression in one library were set to a value of one). A color is attributed to the tag according to the significance of the P value. Differently expressed tags (P < 0.01) are encircled.