Table 1.

Apparent K _M and relative V _max for Neu5Ac with 10 μL of Δ56ST3Gal I or Δ56ST6Gal I in the cell culture medium of transfected HEK293.

	V max [pmol min−1]	K M [μm]	V max/K M [a]
Δ56ST6Gal I	0.209±0.008	2.79±0.53	0.079
Δ56ST3Gal I	1.773±0.159	41.23±7.64	0.043

[a] Relative substrate activity.