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The changes of sulfated mucopolysaccharides and mucopolysaccharidases during bovine fetal development were analyzed. It is shown that chondroitin sulfate C increases in concentration up to the 50th day of fetal development and then decreases progressively until its complete disappearance in most adult tissues. Likewise, hyaluronidase also reaches a peak on the 50th day and decreases in activity until its disappearance in adult tissues. On the other hand, heparitin sulfate and chondroitin sulfate B as well as beta-glucuronidase and beta-N-acetylglucosaminidase remain without significant changes during the whole period. The fetal chondroitin sulfate C is tissue specific with different molecular weights depending on the tissue of origin. Some properties of fetal muscle and brain hyaluronidase are also described. The possible role of chondroitin sulfate C and hyaluronidase in the processes of differentiation and division is discussed in view of the present findings.
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Sampaio et al. (1981) studied this question.
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