Abstract
Guinea pig skin collagenase, isolated from culture medium of whole skin, was separated into two enzymatically active fractions. These two fractions have been purified extensively. Peak II fraction has been purified to homogeneity as examined by polyacrylamide gel electrophoresis. Their molecular weights are approximately 130 000 (peak I) and 40 000 (peak II). Both guinea pig skin collagenase fractions are capabe of degrading the native collagen fibrils and are inhibited by serum, cysteine and EDTA. They appear to be glycoproteins. Guinea pig skin (peak II) and human skin collagenase were compared. They are both glycoproteins and have similar molecular size ( M r = 40 000). Immunodiffusion assay showed that no cross-reactivity was seen between the enzymes, indicating species specificity among collagenases.
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