PubMed · 198260
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B Lewis. 1977. Plasma-lipoprotein interrelationships.. https://doi.org/10.1042/bst0050589
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A procedure for the rapid development of immunoprecipitins in agarose gels has been developed using polyanion precipitation after immunoelectrophoretical separations. Excellent results are obtained for serum apolipoproteins, immunoglobulins and other proteins. It is shown that quantitative determination of apolipoprotein B in hyperlipemic serum and isolated lipoproteins is affected by immunoprecipitated complexes when rocket immunoelectrophoresis is used. This effect can be avoided by addition of polyvinylpyrrolidone.
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In the present paper we show for the first time monoacylglycerol hydrolase in human platelets. No monoacylglycerol hydrolase activity could be demonstrated in the other blood cells. The monoacylglycerol hydrolase of platelets could not be released from the cells by heparin, thus the enzyme is distinct from the postheparin plasma lipases. The enzyme could be solubilized by a non-ionic detergent, Triton X-100. The solubilized monoacylglycerol hydrolase from platelets was optimally active at pH between 7 and 8 and at ionic strength corresponding to [NaCl] between 0.1 and 0.3 M. The optimal assay temperature was 37 degrees C. The enzyme activity was sensitive to HgCl2 but not to NaF. Accordingly, it was stabilized by 2-mercaptoethanol.