Abstract:
:The hydrolysis of paraoxon (POX), phenylacetate (PA) and beta-naphthylacetate (BNA) was studied in human serum. Based upon correlations between enzyme activities, upon reversible inhibition by EDTA and upon progressive inhibition by iso-OMPA, tabun, eserine and bis-4 nitrophenylphosphate, the following conclusions were drawn about the number and specificity of enzymes involved in the hydrolysis. Two paraxonases hydrolyse paraoxon: one sensitive and the other insensitive to EDTA. The EDTA-sensitive paraoxonase also hydrolysed BNA. The EDTA-insensitive hydrolysis of BNA and PA was attributed to a serine esterase. The EDTA-sensitive hydrolysis of PA is probably due to more than one enzyme, which might be an arylesterase and a carboxylesterase.
journal_name
Chem Biol Interactjournal_title
Chemico-biological interactionsauthors
Reiner E,Pavković E,Radić Z,Simeon Vdoi
10.1016/0009-2797(93)90027-vsubject
Has Abstractpub_date
1993-06-01 00:00:00pages
77-83issue
1-3eissn
0009-2797issn
1872-7786pii
0009-2797(93)90027-Vjournal_volume
87pub_type
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