Suppression of vulval induction by ptp-2(op194). (A,B) Nomarski images of unc-4(e120) II; lin-15(n765) X (top left) and ptp-2(op194) unc-4(e120) II; lin-15(n765) X (top right) adult hermaphrodites. Open arrows denote the position of the functional vulva derived from the VPCs P5.p, P6.p, and P7.p. Black arrows indicate ectopic pseudovulvae that arise from aberrant induction of P3.p, P4.p, and P8.p. Note the complete suppression of P3.p, P4.p, and P8.p induction in B. Magnification, 200×. (C) Nomarski composite of ptp-2(op194) II; sem-5(n1779) X L4 hermaphrodite. The open arrow indicates the partial induction of P6.p. The remaining uninduced Pn.p cells are indicated. Anterior is to the left. The scale bar is for C only.