Binds as a ligand to a family of frizzled seven-transmembrane receptors and acts through a cascade of genes on the nucleus. Segment polarity protein. May function in gonadogenesis and limb development. Wg and Wnt2 have a role in the developing trachea and together are responsible for all dorsal trunk formation. Dynamic expression pattern during embryogenesis. Expression is predominantly segmented, with expression also seen in the limb primordia and presumptive gonads. In embryonic tracheal cells, expression is close to and dorsal to the tracheal placode. Palmitoleoylated by porcupine. The lipid group functions as a sorting signal, targeting the ligand to polarized vesicles that transport Wnt2 to unique sites at the cell surface. Depalmitoleoylated by notum, leading to inhibit Wnt signaling pathway. Belongs to the Wnt family.