Sialylated carbohydrate chains of recombinant human glycoproteins expressed in Chinese hamster ovary cells contain traces of N-glycolylneuraminic acid. (1990)

Hokke C, Bergwerff A, van Dedem G, van Oostrum J, Kamerling J, Vliegenthart J
FEBS Lett, 1990 vol.275:9-14