Burs-protein is expressed in a subset of peptidergic neurons in the larval ventral nerve cord. Directly after eclosion expression is detected in around 14 neurons in the posterior part of the thoracico-abdominal ganglion. This number decreases to zero over the first day after eclosion.
burs protein is detected in several pairs of neurons in the pharate pupae ventral nerve cord. Strong expression is detected in one neuron in each T3, A5-A7 segments and 2 neurons in segments A1 to A4. All of these neurons also express
CCAP transcript, and one neuron in each A1-A4 segments co-expresses
pburs transcript. Expression of
burs protein is very similar to the expression of
burs transcript.
burs protein is expressed in a subset of CCAP neurons labeled with
Scer\GAL4CCAP.PP in the adult brain, including neurons in the subesophageal ganglion that extend their axons along the midline to the anterior brain.
In the larval ventral nerve cord,
burs is prominently expressed in: two prominent pairs of neurons in the subesophageal ganglion; one pair of neurons in each of the first two thoracic neuromeres and two pairs in the third; two pairs of neurons in each of the first four abdominal neuromeres, and one to two pairs in the remaining abdominal neuromeres. In the adult,
burs is expressed in a bilateral pair of neurons in the subesophageal ganglion, and in seven bilaterally paired neurons of the third thoracic neuromere and the abdominal ganglion.
