Fig. 2. Expression of developmentally regulated genes in the adult mouse intestine. E11-E17 fetal gut and adult (12-week) duodenum (D), jejunum (J), ileum (I) and colon (C) were analyzed by RT-PCR for selected transcripts that display developmentally regulated expression in SAGE analysis. Representative examples are shown for three categories, defined according to the relationship among expression levels at E13, E15 and E17, i.e. Increasing, Dynamically regulated or Decreasing; numbers in parentheses refer to the number of transcripts investigated in each class.