Evidence that tip and stalk markers described to date respect a common boundary
| Marker* . | Expressed in . | Boundary position . | Source of information . |
|---|---|---|---|
| DBA binding | Stalk | 67 μm (σ=18 μm) | Michael et al., 2006 |
| Collagen XVIII | Stalk | 70 μm (σ=25 μm) | Our measurements from figure 1F,H of Lin et al., 2001 |
| Wnt11 | Tip | 71 μm (σ=18 μm) | Michael et al., 2006 |
| Sox9 | Tip | 89 μm (σ=38 μm) | Our measurements from figure 6A of Kent et al. 1996 |
| High proliferation | Tip | Within the first 100 μm (low spatial resolution data) | Michael and Davies, 2004 |
| Marker* . | Expressed in . | Boundary position . | Source of information . |
|---|---|---|---|
| DBA binding | Stalk | 67 μm (σ=18 μm) | Michael et al., 2006 |
| Collagen XVIII | Stalk | 70 μm (σ=25 μm) | Our measurements from figure 1F,H of Lin et al., 2001 |
| Wnt11 | Tip | 71 μm (σ=18 μm) | Michael et al., 2006 |
| Sox9 | Tip | 89 μm (σ=38 μm) | Our measurements from figure 6A of Kent et al. 1996 |
| High proliferation | Tip | Within the first 100 μm (low spatial resolution data) | Michael and Davies, 2004 |
Some markers (Wnt9b) are missing from this list because no scale bars were provided in the micrographs presented by the authors who described their expression patterns.