Inhibition of endothelial cell proliferation by MBP-calreticulin. Fetal bovine heart endothelial cells (800 cells/well) were incubated for 5 days either in medium alone or medium supplemented with bFGF (25 ng/mL), with or without recombinant purified MBP-calreticulin or MBP (both at 1 μg/mL). The results of 16 experiments are expressed as mean cpm (±SD).