Table II.

Cell treatments.

Treatment	Source	Cat. No.	Vehicle	Stock Conc.	Working Conc.
Recombinant Human BMP4	Life Technologies (Paisley, UK)	PHC-9534	4 mM HCl/ 0.1% BSA in PBS	10 μg/ml	1–100 ng/ml as indicated in text
Recombinant Human BMP2	Life Technologies (Paisley, UK)	PHC-7145	4 mM HCl/ 0.1% BSA in PBS	100 μg/ml	1–100 ng/ml as indicated in text
Recombinant Human Gremlin, CF	R&D Systems (Abingdon, UK)	5190-GR-050	PBS	200 μg/ml	1 μg/ml
Recombinant Human PRDC/GREM2, CF	R&D Systems (Abingdon, UK)	8436-PR-050	4 mM HCl in PBS	500 μg/ml	100 ng/ml