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pubmed-article:2200305pubmed:abstractTextTwo alternative procedures are described for the quantitative determination of phosphatidylcholine in a flow-injection system utilizing immobilized enzymes. Phospholipase C from Bacillus cereus and phospholipase D from cabbage were covalently bound to the surface of controlled-pore glass beads and the enzyme-derivatized beads were packed in small columns. In the first procedure, the phospholipase C column was connected with a second column containing coimmobilized alkaline phosphatase and choline oxidase. In the alternative procedure, the column packed with immobilized phospholipase D was connected with a column packed with immobilized choline oxidase. The hydrogen peroxide produced through the action of choline oxidase in both flow-injection systems was detected amperometrically. Both procedures are suitable for an accurate and rapid quantitation of phosphatidylcholine. The sensitivity of the method based on phospholipase C and alkaline phosphatase is higher than that using phospholipase D. Quantitation of phosphatidylcholine at the nanomole level can be easily obtained using the first method.lld:pubmed
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pubmed-article:2200305pubmed:articleTitleDetermination of phosphatidylcholine in a flow injection system using immobilized enzyme reactors.lld:pubmed
pubmed-article:2200305pubmed:affiliationInstitute of Biochemistry, University of Baluchistan, Quetta, Pakistan.lld:pubmed
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