the relative rates of appearance of counts from 35so4 ( 2- ) and d- [ 14 ] glucosamine in chondroitin 4-so4 and chondroitin-6-so4 are used to calculate the specific activity of the udp-n-acetyl-d- [ 14c ] hexosamine pool at each stage in the labeling period .
C0876712
glucosamine
C0008454
chondroitin