... expression in the Drosophila eye. Defective proventriculus Shadow enhancer Dark shadow enhancer Rhodopsin Drosophila retina Photoreceptor Spineless Orthodenticle Spalt Genes are expressed at distinct cell type-specific levels at different times during development. Expression...

... does not. These results thus indicate that temporal regulation of Wg is decisive to distinguishing maxillary and antennal organs. Wg normally acts upstream of the antennal selector spineless ( ss ) in maxillary development. However, mis-expression of Ss can prematurely activate wg via a positive...

... to differentiation of antenna-specific characteristics. Antenna-specific expression of dan and danr depends on a regulatory hierarchy involving homothorax and Distal-less , as well as cut and spineless . We propose that dan and danr are effector genes that act downstream of these genes to control differentiation...

... for antenna development. The nuclear factors, Homothorax, Distal-less and Spineless, are each required for particular aspects of antennal fate. Coexpression of Homothorax, necessary for nuclear localization of its ubiquitously expressed partner Extradenticle, with Distal-less is required to establish antenna...

... three tarsal rings are Spineless-dependent. Thus bric a brac is regulated differentially even within a single appendage type. The restriction of bric a brac expression to the distal portion of the Distal-less domain is a consequence of negative regulation by distinct sets of genes in different limb...