Table 1. Identification of the FSAP cofactor from cell-conditioned medium.

Conditioned medium from CHO-745 cells was treated as indicated and subsequently tested for FSAP cofactor activity as compared with buffer control (representing 100%) containing each of the additives indicated. The results are representative of one experiment out of four.

Biomolecule classification	Treatment of cell-conditioned medium	FSAP activity (% of control)
Protein	Protease inhibitors	350
	Heat denaturation	350
	Trypsin, soya-bean trypsin inhibitor	450
Carbohydrate	Glycosidase	200
	Neuraminidase	250
Lipid	Butanol extract	200
	Methanol/chloroform extract	200
Nucleic acid	Dnase	450
	RNase A	100