Maxillary palp ORN axons:
A) are attracted to Sema2A/2B in the developing antennal lobe.
B) are repulsed by Sema2A/2B in the developing antennal lobe.
C) are repulsed by Sema1A expression in other maxillary palp ORN axons.
D) are repulsed by Sema1A expression in antennal ORN axons.
E) All of the above

Question

Quizplus · Accepted Answer

Sema1Aexpression in antennal lobe ORN axons, but not maxillary palp ORN axons, is necessary for proper MP axon targeting. Sema2A/2Bappear to be necessary for the targeting of antennal ORN axons (although it seems possible that this might be indirect, as a result of earlier PN partner targeting).

Maxillary Palp ORN Axons