treatment of gag fractions isolated from the three sources ( cortex , glomeruli , and gbm ) with nitrous acid ( which degrades heparan sulfates ) indicated that the majority ( 85 % , 65 % , and 87 % ) of the ( 35 ) s radioactivity as well as the majority ( 60 % , 50 % , and 91 % ) of the ( 3 ) h radioactivity from all three sources was degraded by this treatment .
C0017973
gag
C0019143
heparan sulfates