..., optomotor-blind ( omb ) and brinker ( brk ),collaborate to initiate formation of the fifth longitudinal (L5) wing vein. omb is broadly expressed at the center of the wing disc in a pattern complementary to that of brk , which is expressed in the lateral regions of the disc and represses omb expression. We...

.... These clones still caused repolarisation in the back half of the clone and behind it ( Fig. 1 ) arguing strongly that the Hh protein cannot be a component of ‘X’ and raising again the question, what is X? X should be engendered downstream of Hh receipt, which is where we start our search. omb...