Summary of the in vivo activity of Flk-1enhancer fragments
| Enhancer fragment (bp) . | TG . | EC . |
|---|---|---|
| 324 | 8 | 0 |
| 225 | 9 | 1 |
| 321 | 8 | 0 |
| 430 | 15 | 6 |
| Enhancer fragment (bp) . | TG . | EC . |
|---|---|---|
| 324 | 8 | 0 |
| 225 | 9 | 1 |
| 321 | 8 | 0 |
| 430 | 15 | 6 |
The number of embryos is indicated. Embryos were transgenic for LacZ reporter gene constructs containing the 939-bp Flk-1promoter spanning bp −640 to bp +299, and intron fragments depicted in Figure 1C. TG indicates number of transgenic embryos analyzed; EC, number of transgenic embryos showing endothelium-specific reporter gene expression.