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Clinical Chemistry, Vol 35, 2325-2326, Copyright © 1989 by American Association for Clinical Chemistry
DS Miyada, A Fagin, H Pirkle, J Ocariz and ND Vaziri
Department of Pathology, University of California, Irvine Medical Center, Orange 92668.
The LDH isoenzyme composition of 12 platelet preparations was determined by electrophoresis. The mean (+/- SD) percentages of LDH-1, LDH-2, LDH-3, LDH-4, and LDH-5 were 16.6 +/- 1.7, 30.1 +/- 1.0, 34.2 +/- 1.3, 18.2 +/- 1.3, and 0.9 +/- 1.1, respectively. In comparison with previous data, these data show identical ranking of the prevalence of each isoenzyme but significantly different percentages, particularly of LDH-1 and LDH-4. The release of platelet LDH by freezing and thawing differed little from that by homogenization.
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