Table 1. Endothelial and pronephron gene expression overlaps at 10 hpf, and this overlap decreases by 14 hpf and is no longer observed at 18 hpf.

Spearman correlation coefficient (ρ) between the expression of fli1a and the expression of four pronephron genes: pax2a, osr1, foxj1a, and hnf1bb; significant correlation is observed at 10 but not 18 hpf. A full list of gene expression correlations to fli1a expression and changes between the time points can be found in table S5. P values were adjusted to counteract the multiple testing problem.

Correlation of fli1a to:	ρ/P value at 10 hpf	ρ/P value at 14 hpf	ρ/P value at 18 hpf	Δρ/P value, 10 versus 14 hpf	Δρ/P value, 10 versus 18 hpf
pax2a	0.54/< 0.0001	0.38/< 0.0001	0.03/> 0.99	−0.16/0.00019	−0.51/< 0.0001
osr1	0.41/< 0.0001	−0.06/> 0.99	−0.07/> 0.99	−0.46/< 0.0001	−0.48/< 0.0001
foxj1a	0.50/< 0.0001	0.17/0.32	−0.03/> 0.99	−0.33/< 0.0001	−0.54/< 0.0001
hnf1bb	0.44/< 0.0001	0.27/< 0.0001	−0.02/> 0.99	−0.17/> 0.99	−0.46/< 0.0001