abstract |
By using a microorganism having a gene obtained by modifying the base sequence of α2,3-sialyltransferase gene originating in a microorganism belonging to the genus Haemophilus, α2,3-sialyltransferase can be produced in a large amount. Moreover, a complex saccharide containing sialic acid can be economically produced in a large amount by bringing a microorganism producing the above-described enzyme with CMP-NeuAc and a receptor complex saccharide in an aqueous medium. |