Fig. 3. Dynamic expression of adhesion proteins in the central nervous system. In wild-type embryos, the fluorescence levels measured by laser confocal microscopy for Armadillo, Fasciclin 2 and Neuroglian changed significantly within a short developmental interval. Each bar represents the mean value for a sample of at least six embryos and the s.e.m. is indicated. An increase was found for Armadillo (P=0.005), Fasciclin 2 (P=0.003) and Neuroglian (P=0.001); significance was calculated with the Student's t test. See Materials and Methods for the conditions used for immunostaining, confocal microscopy and quantification of fluorescence levels.