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Enzymatic Galactosylation of Cello‐ and Chito‐Oligomers

Terminal galactosylations of cello‐ and chito‐oligomers are studied employing galactosyltransferase with and without α‐lactalbumin. The lactose synthase complex allows just for galactosylation of cellobiose in lower yield but not for higher cello‐oligomers. In contrast, the affinity in galactosylation of chito‐oligomers increases with higher members to reach the maximum at chitohexaose with only a 30% reduction in transfer rate. In addition to kinetic data, preparative studies with a number of acceptor substrates gave galactosylated oligosaccharides in high yields.