Table 1. Growth factor concentrations in Matrigel and growth factor-reduced Matrigel.

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Growth factor	*Matrigel	GFR Matrigel
EGF (ng/ml)	0.5–1.3	<0.5
bFGF (pg/ml)	0–0.1	0–0.1
NGF (ng/ml)	<0.2	<0.2
PDGF (pg/ml)	12	<5
IGF-1 (ng/ml)	15.6	5
TGF-β (ng/ml)	2.3	1.7

*The average concentrations of growth factors in Matrigel are shown as multiple lots were used. GFR, growth factor reduced.