Abstract
Normal stratum corneum and psoriatic scales were homogenized and a differential centrifugation was performed. The DNase activity of the individual fractions was investigated by micro-dis-electrophoresis. At pH 5 only in the 600xg pellet and 105.000xg supernatant of normal keratin DNase activity could be observed. However, all psoriatic fractions showed distinct enzyme activities. At pH 7.4 little psoriatic DNase activity could only be demonstrated in the 105.000xg supernatant. Except from the 15.000xg pellet all fractions of normal stratum corneum displayed marked activities. In addition the 105.000xg supernatant showed two different DNase bands.
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