Kin of irre (kirre) encodes a transmembrane protein of the Ig superfamily that is involved in heterotypic interactions with the product of sns. Interactions with intracellular adaptors regulate cytoskeleton dynamics. Its biological roles include myoblast aggregation and fusion, nephrocyte diaphragm formation, and cell sorting in the eye and wing imaginal discs.

Verprolin 1, isoform G; Verprolin 1 (Vrp1) encodes the sole Drosophila homolog of the conserved Verprolin/WASp-interacting-protein family of actin regulators. It facilitates myoblast fusion in somatic muscles by recruiting the branched-actin polymerization machinery to sites of myoblast-myotube attachment and fusion.

Suppressor of variegation 2-10 (Su(var)2-10) encodes a member of the PIAS protein family that regulates chromosome structure and function. As a JAK/STAT pathway regulator, it contributes to eye formation and eye determination.

Rolling pebbles (rols) encodes a protein required for myoblast fusion in founder cells. it interacts with the membrane spanning Immunoglobulin superfamily protein encoded by kirre and with the product of Mhcl.

Sticks and stones (sns) encodes a single-pass transmembrane protein of the immunoglobulin superfamily, which mediates cell-cell recognition and adhesion. The product of sns marks the fusion competent population of myoblasts. It also contributes to formation and function of the nephrocyte diaphragm and cell sorting within the developing ommatidia.

Myoblast city (mbc) encodes an unconventional bipartite GEF that, in combination with the product of Ced-12, activates the monomeric GTPase encoded by Rac1. It contributes to myoblast fusion, border cell migration and dorsal closure; Belongs to the DOCK family.

Singles bar (sing) encodes a small multipass transmembrane protein that is required for muscle fusion in embryonic and adult stages. It is needed for progression beyond the pre-fusion complex stage of myoblast fusion, possibly by delivering fusion machinery components by vesicle fusion.

Guanine nucleotide exchange factor MSS4 homolog; Guanine-nucleotide-releasing protein that acts on members of the sec4/ypt1/rab subfamily such as Rab8. During egg development, essential for establishing and maintaining epithelial cell polarity by regulating the correct polarized deposition of basal membrane (BM) proteins such as trol/Pcan and vkg/Coll IV to the basal surface of follicular epithelial (FE) cells. Likely to function by restricting the activity of the vesicle transport regulator Rab8 to the basal membrane, and thus directs BM protein-containing vesicles to the basal side o [...]

ADP-ribosylation factor 1; GTP-binding protein involved in protein trafficking; has a role in Golgi organization and may modulate vesicle budding and uncoating within the Golgi apparatus (Probable). Has a role in eye development. Required for cleavage furrow ingression in embryonic cells.