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SummaryProteolytic enzymes from various cellular sources were tested against pro-teinase inhibitors of human serum. Serum α1-antitrypsin was shown to inhibit the proteolytic enzymes of human leucocytes. This finding was interpreted in relation to the association between ai-antitrypsin deficiency and pulmonary emphysema.
Kueppers et al. (Fri,) studied this question.