"FIGURE 5.11. Annular domains of gene expression, plotted along the leg’s proximal-distal axis (= peripheral to central in the disc). Genes are grouped based on whether expression is broad, narrow, or iterated, and they are seriated within each group based on proximal limits.
Black bars are regions that express the indicated genes (mRNA or reporter) during late 3rd instar (3), early pupal period (P), or adult (A) stage. Degrees ofexpr ession are indicated by shades ofgr ay or by graded slopes. All areas are plotted on an adult template, but not all genes are expressed then. The span ofstages (e.g., “3-P”) indicates when expression has been seen, but it does not mean that expression is confined to that time. When the claw icon is filled in, this means that two dots (or one solid spot) are detected where claws arise [1587, 2287], although they could be apodemes [33, 3971], and the “spot” might actually occupy the pretarsus . See [851, 2287] for histology and  for overview of circuitry. See App. 7 for discussion.
Genes whose LOF alleles affect anatomy are in white letters on black background. Wiring at left ( activation; inhibition) shows some genetic interactions (see text or references below at upstream or downstream gene). “External signal” means that the upstream gene emits a signal that affects the downstream gene in nearby cells by diffusion (esg ? dac) or contact (BarH1 ? fasII). Horizontal “T” extensions within the template are confidence limits (not inhibitor icons), although their absence does not imply certainty. Charting is more precise in pupal or adult legs than in discs . Sternopleura (Stpl) comes from the leg disc but is not part of the leg per se (Co, coxa; Tro, trochanter; Fem, femur; Tib, tibia; T1-5, tarsal segments; * = “pretarsus” [2287, 4008]; Cl, claws).
Genes (“DO” = details omitted): al (aristaless; DO: Co expression is dorsal only and Tib expression is ventral only) [618, 881]