Table 1.

Comparison of predicted and experimental steady state vascular endothelial growth factor (VEGF) and soluble VEGF receptor 1 (VEGFR1) levels

Species	Predicted concentration, pM	Range of experimental measurements	References
Free VEGF
Normal, muscle	3.2	0.3– 3.0	(7–12)
Plasma	2.0	0.4– 3.0	(15)
Tumor	26.0	8.0– 389.0	*
Soluble VEGFR1
Normal, muscle	0.3	0.5	(13)
Plasma	3.4	0.2– 3.0	(14,16–19)
Tumor	23.0	†	†

* See Supplementary Table 1 (available online).

† No data available.