Fig. 1. Induction capacity of the three apical regions (hypostome, the tentacle zone and the 1-region) as measured by transplantation. (A) The procedure for the hypostome and 1-region, and (B) the results of the procedure. The number of epithelial cells per region is the average of three measurements. The value for the tentacle zone is 1300±190. Values for one-quarter regions are calculated from the measurements for the whole region. For the one-quarter tentacle zone, several axes derived from donor had a single apical tentacle instead of a complete head. All values are ±s.e.m.
