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The chemotactically active peptide products from the action of cutaneous collagenase upon purified soluble and native collagen were isolated and partially purified. These leukotactic collagenolysis products were made up of at least eight polypeptides weighing between 30,000 and 1000 daltons and seven of these peptides were leukotactic in vivo at a concentration of 10-10M.
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Houck et al. (1971) studied this question.
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