the specific activity of sialic acid in the synaptosomal soluble glycoproteins 2 hr after labeling was greater than 100 times that of the synaptosomal particulate fraction , whereas the difference in hexosamine specific activity in these two fractions was only twofold , and by 22 hr there was little or no difference in the specific activities of sialic acid and hexosamine in synaptosomal soluble as compared to membrane glycoproteins .
C0017968
glycoproteins
C0025248
membrane glycoproteins