Abstract

Matrix vesicles were isolated from the epiphyseal growth plates of normal weanling rats, and the presence of carbonic anhydrase II was demonstrated by Western blotting and ultrastructural immunolocalization using the immunogold technique. Total carbonic anhydrase activity was assayed and showed a statistically significant increase in matrix vesicles as compared to normal rat chondrocytes derived from the same growth plates. These results are the first to establish the presence of carbonic anhydrase in matrix vesicles.

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