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Fig. 1. Delta localization in eye discs. (A-C) Tangential sections through adult
eyes are shown. The numbers in A refer to the outer R-cells, R1-R6. (D-F)
Confocal images of eye discs labeled with anti-Delta are shown. Anterior is
towards the right and the arrows indicate the position of the furrow. (G) A
diagram of the early stages of ommatidial assembly. A is anterior, P is
posterior; 0-4 at the top indicate columns emerging from the furrow (mf).
R-cell identities are indicated by the numbers inside the circles. The red
cells may be those that become ectopic R-cells in faf mutants.
(H-H'') Enlargement of the boxed region in E. Numbers indicate R-cells
and asterisks indicate an ectopic R-cell. In H'', both membrane-bound
Delta (yellow) and vesicular Delta (green) are present. Scale bar: 20 µm in
A-C; 10 µm in D-F; 5 µm in H-H''.
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