Abstract
The Irre Cell-Recognition Module (IRM) of Drosophila comprises the products of the genes roughest (rst), kin-of-irre (kirre), sticks-and-stones (sns) and hibris (hbs) and form a small subgroup of evolutionarily conserved transmembrane glycoproteins belonging to the immunoglobulin superfamily. IRM molecules normally work cooperatively in a wide variety of developmental processes during an…