31. NG2 is another type of chondroitin sulfate proteoglycan that is expressed by oligodendrocyte precursor cells. 32. This enzyme participates in chondroitin sulfate biosynthesis. 33. There are 3 consensus sequences for N-glycosylation and 1 chondroitin sulfate substitution site. 34. Similar trials have been done with chondroitin . 35. Proponents theorize that taking extra glucosamine stimulates new cartilage production, while chondroitin slows its destruction. 36. Chondroitin sulfate shows first-order kinetics up to single doses of 3, 000 mg.37. One of the sulfated ligands is chondroitin sulfate, a type of glycosaminoglycan ( GAG ). 38. Versican is a large chondroitin sulfate proteoglycan with an apparent molecular mass of more than 1000kDa. 39. Test-tube studies suggest that glucosamine can stimulate cartilage production, while chondroitin slows its removal. 40. Even if you are having surgery, however, you can benefit from taking glucosamine and chondroitin .