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Clinical Chemistry, Vol 27, 922-923, Copyright © 1981 by American Association for Clinical Chemistry
DE Bruns, JC Emerson, RL Bertholf, KE Hill and J Savory
We describe a centrifugal analyzer method for measuring the LD-1 isoenzyme of lactate dehydrogenase (EC 1.1.1.27) in serum, after immunochemical precipitation of the other four isoenzymes. Enzymic activity was measured kinetically at 30 degrees C with the pyruvate-to- lactate assay. The method for LD-1 was linear to 1000 U/L. The precision (CV) of the assay was 1.0--2.2% within-run and 3.1--4.5% day- to-day. The reference interval was 26--73 U/L (n = 51), corresponding to 21--35% of total LD activity.
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