Fasciclin 2 (Drosophila NCAM) is a homophilic Cell Adhesion Molecule expressed at moderate levels in the proliferating epithelial cells of imaginal discs. where it engages EGFR in a cell autonomous auto-stimulatory loop that promotes growth along larval development. In addition. Fasciclin 2 is expressed at high levels in the pre-differentiating cells of imaginal discs. https://www.roneverhart.com/7-Plush-Oswald-Octopus/