wg Complementation group I I Wingless wnt1 Wnt-1 fg D.int-1 l(2)rO727 DWint-1 Bristled l(2)SH2 1281 Dm Wg Dint-1 l(2)02657 CG4889 WG spade int-1 Wnt WNT lethal (2) SH1281 glazed wgl Glazed Dwnt-1 dWnt Dm-1 Sternopleural Wnt1 spd l(2)SH1281 flag Sp l(2)wg wnt Wg Br Gla wingless DWnt-1 gene