Figure 1From: Rec. ST6Gal-I variants to control enzymatic activity in processes of in vitro glycoengineeringLeft panel: Variant delta89 yields 88% G2+2SA sialylation. However, after prolonged incubation (24 hrs), the bi-sialylation is reduced to a stable mono-sialylation product, presumably by a sialydase activity. Right panel: Variant delta108 yields 70% G2+1SA and 7% G2+2SA sialylation.Back to article page