FIG. 3.

Chromatograms of 1,2-diamino-4,5-methylenedioxybenzene derivatives of NeuAc and NeuGc obtained from the epithelial cells of horse trachea. The standard mixture of NeuAc and NeuGc and epithelial cells from horse trachea was treated as described in Materials and Methods. The fluorescence of SA derivatives was detected at an excitation wavelength of 373 nm and an emission wavelength of 448 nm.