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. If you have any thoughts regarding exactly where and how to use manufacturer of sialic acid powder for cosmetic Ingredients, you can speak to us at the page. The glycan array binding data provide independent support of AAV1 interaction with α2,3 and α2,6 trisaccharides.