Author response image 2. (A) Amon was expressed in pale R7 cells (circled in purple) but not in yellow R7s (circled in red).

It was also expressed in some outer PRs (circled in blue) and absent from other pale R7 cells (circled in white). (A’) Ss marks yellow R7 cells (circled in red). (A”) Amon was present in some but not all Ss-negative pale R7s (circled in purple) but absent from Ss-positive yellow R7s (circled in red).