Chemical and Enzymic Reactions by

—Sequence of the Glycosphingolipid Shown in Fig. 11, after Enzymic Degradation with a-D-Galactosidase. (Cleavage points, and the masses of fragment ions of the permethy-lated derivative, are shown.) 

The use of f.a.b.-m.s. to monitor hydrolysis and acetolysis reactions is illustrated by studies on a yeast high-mannose oligosaccharide containing two phosphoric esters (19). The molecular-ion region of the negative f.a.b. 

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