Table 3. LIN-29-induced seam cell fusion in earlier developmental stages.
| Time of heat shock | Time observed | Strain | % Multiple or all seam cells fused | % Only one fusion between two cells | N |
|---|---|---|---|---|---|
| Late L2 | Early L3 | hs::control; heIs63 | 0 | 7 | 42 |
| hs::lin-29; heIs63 | 45 | 0 | 42 | ||
| Early L3 | Mid L3 | hs::control; heIs63 | 0 | 0 | 30 |
| hs::lin-29; heIs63 | 82 | 3 | 60 | ||
| Early L3 + mid L3 | Late L3 | hs::control; heIs63 | 0 | 0 | 18 |
| hs::lin-29; heIs63 | 100 | 0 | 30 |
Animals expressing GFP in the nucleus and at the plasma membrane of the seam cells (from heIs63; see Materials and Methods) and carrying either hs::lin-29 or hs::control were heat-shocked as indicated and observed for precocious seam cell fusion at the time shown. Multiple and single fusion events were scored with epifluorescence microscopy. In all cases P ≤ 0.0001 (Fisher’s exact test) compared to the corresponding hs::control.