TABLE 1.

Effects of various compounds and metal ions on sialidase activity

Compound or metal ion (10 mM)	% sialidase activity (relative to control)
	CN3718	ENanJ	ENanI	ENanH
None (control)	100	100	100	100
Fe2+	101	188	111	65
Fe3+	56	87	33	79
Ca2+	90	100	100	71
Co2+	110	200	104	78
Ni2+	94	155	95	90
Mn2+	110	170	115	53
Mg2+	115	117	124	99
Zn2+	61	136	65	88
p-Chloromercuribenzoate	18	54	13	5
EDTA	104	105	86	97