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. 1983 Jul;41(1):65-78.

Stability of the paraoxonase phenotyping ratio in collections of human sera with differing storage times

M Brackley, G Carro-Ciampi, D J Stewart, J A Lowden, A K Ray, W Kalow
  • PMID: 6312517

Stability of the paraoxonase phenotyping ratio in collections of human sera with differing storage times

M Brackley et al. Res Commun Chem Pathol Pharmacol. 1983 Jul.

Abstract

Results from automated testing of 673 human sera, divided into four batches by duration of storage at -20 degrees C, indicated that paraoxon-hydrolysing activity, a, decreased with increased storage time. By contrast, the paraoxonase phenotyping ratio, c/b, a ratio designating enzyme activation by Na+ in the presence of Ca2+, was stable over a four year storage period.

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