CMP-p-Neu5Ac

Cytidine 5 -(5-acetamido-3,5-dideoxy-D-g/ycero-P-D-ga/acto-non-2-ulopyranosylonic acid monophosphate) (CMP-p-Neu5Ac)... 

As mentioned above, the periodic acid/thiobarbituric acid methods only function with free sialic acids. This means that prior release of glycosidically bound sialic acids must be undertaken before analysis. Care should be taken in the case of sialic acid glycosides known to break down under the conditions of the assay, e.g. CMP-p-Neu5Ac (Aminoff 1961) and various synthetic ketosides of sialic acid (Meindl and Tupfy 1967, Khorlin et al. 1970). This inevitably leads to erroneous values of free sialic acid and involves other parameters which need consideration. These are discussed below in II. 10. 

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