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Fig. 8. T-Serrate expression in wild-type and T-Sp8 RNAi legs. The rings mark the positions of the leg joints. 0, body wall/coxa; 1, coxa/trochanter; 2, trochanter/femur; 3, femur/tibiotarsus; 4, tibiotarsus/pretarsal claw. (A) T-Sp8 expression in wild-type legs (same embryo as in Fig. 2J). No T-Sp8 expression is seen in the region of the body-wall/coxa joint. (B) T-Serrate expression in wild-type legs. (C) T-Serrate expression (*) in T-Sp8-RNAi legs (weak RNAi effect). (D) T-Serrate expression (*) in T-Sp8-RNAi legs (strong RNAi effect).