Fig. 6. Developmental regulation in `isolated' P-type cells. (A) An example of an `isolated' op₄.ap cell clone. (B) An example of an `isolated' op<sub>4</sub>.pp blast cell clone. In both cases, the `isolated' P-type cell gives rise to pattern elements that are normally derived from the ablated sublineages (marked by parentheses) and unidentifiable cell clusters (marked by asterisks). Note that `isolated' P-type cells give rise to a variable combination of pattern elements (see Table 1), and differing combinations were seen in different embryos. Scale bar: 20 µm.