| 摘要 |
A sialyltransferase having the following physico-chemical properties: (1) Activity: transfers Sialic acid from a sialic acid donor selectively to a 3-hydroxyl group of a galactose residue contained in lactosylceramide as a sialic acid acceptor to produce ganglioside GM3; (2) Optimal Reaction pH: 6.0 to 7.0; and (3) Inhibition and Activation: the activity increases at least 1.5 times with 10 mM of Mn2+ as compared with the case in the absence thereof.
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