Figure 1.

dDA1 IR in the adult head sections of Canton-S, dumb¹, and dumb² flies. The frontal sections at the levels of the MB lobes (top) and pedunculi along with the central complex (bottom) are shown. dDA1 IR is visualized by red florescence. Canton-S has prominent dDA1 IR in the MB lobes and pedunculi as well as the central complex; however, no dDA1 IR is visible in those structures of dumb¹ and dumb². p, Pedunculus; cc, central complex. All images are at the same magnification. Scale bar, 100 μm.