Abstract
Antiserum prepared against highly purified usual human serum cholinesterase (the most common phenotype) cross-reacted identically with the atypical serum cholinesterase. The level of circulating atypical enzyme protein, determined immunologically, was about 30% lower when the enzyme came from an atypical rather than a usual phenotype, and the level of enzyme activity measured enzymatically atV max with eithero-nitrophenylbutyrate or benzoylcholine as substrate showed approximately the same degree of reduction. The average specific activity (activity atV max per microgram of enzyme protein) in sera from 28 usual and 20 atypical individuals did not differ significantly. These findings suggest that the atypical enzyme not only has altered catalytic properties (K)mbut also might be synthesized more slowly, or clearedin vivo more rapidly, than the usual enzyme.
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This work was supported by U.S. Public Health Service Grants NS 15871 and GM 27028 and by a grant from the Hoffmann-La Roche Foundation.
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Eckerson, H.W., Oseroff, A., Lockridge, O. et al. Immunological comparison of the usual and atypical human serum cholinesterase phenotypes. Biochem Genet 21, 93–108 (1983). https://doi.org/10.1007/BF02395394
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DOI: https://doi.org/10.1007/BF02395394