Differential mRNA distribution of 6 proteins implicated in Semaphorin signaling in neurons. In general, mRNA expression for cfl1, and crmp1-5 was higher in P10 forebrain compared to P30 and Ad brain. Corresponding oligonucleotide sequences and Swiss-Prot entries can be found in Supplemental Table 1. Major brain subdivisions are indicated (Cx, neocortex; DG, dentate gyrus; H, hippocampus; Hyp, hypothalamus; Th, thalamus). Scale bar = 2 mm.