Fig. 1. Metameric hh expression in the trunk visceral mesoderm. hh expressions in wild-type embryos at late stage 11 (A,B,D) or mid-stage 12 (C) are shown. Lateral views of whole embryos (A,B) and enlarged VM-PSs (C,D) stained as indicated. Anterior is leftwards in this and following figures. In addition, except for Figs 4, 6, 7, white arrows indicate VM. PSN and vN (N, numeral), respectively, indicate ectodermal parasegment number and VM-PS number. (A) hh RNA (A1, red) and VM-hh-lacZ (A2, green) expression. (A3) Merged picture. (B) HH protein expression. (C) PTC (C1,2, red) and VM-hh-lacZ (C2, green) expression. Arrowheads, PTC signals in VM. Asterisks, ectodermal PTC signals. (D) hh RNA (D1, red) and ftz-lacZ (D2, green). (D3) Merged picture. hh RNA and ftz-lacZ expression indicate that VM-hh expression occurs in the anterior terminal region of each VM-PS. Interpretation of D1-3 is shown at the bottom.