Previous work using spectrophotometric assays reported that E. coli YjhC showed a weak interaction with Neu5Ac, with an apparent Km of 68.8 mm (20). Here, we used ESI-MS to assess the activity of YjhC against 2,7-anhydro-Neu5Ac or Neu5Ac. The glycan array binding data provide independent support of AAV1 interaction with α2,3 and α2,6 trisaccharides. Our genetic data suggest that YjhB could transport 2,7-anhydro-Neu5Ac but not Neu5Ac, where the previously characterized Neu5Ac transporter NanT wa...
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