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pubmed-article:8061224pubmed:dateCreated1994-9-16lld:pubmed
pubmed-article:8061224pubmed:abstractTextA new type of flow reactor (UCSTR) has been developed that uses anisotropic ultrafiltration membranes in a continuous flow stirred tank reactor (CSTR) to facilitate the study of nonlinear enzyme catalyzed reactions. The design allows the study of enzymes with subunit molecular weights > or = 9000 dalton and protein concentrations up to at least 2 mg/ml under flow conditions with a residence time of 3 min or more, in a reactor of volume 1.67 ml. The UCSTR allows continuous potentiometric or spectrophotometric measurement without design change. Calibration of reactor performance was carried out by reproducing pH oscillations in the ferrocyanide-hydrogen peroxide reaction. Experimental verification of oscillatory glycolysis in the UCSTR was carried out with extract of rat skeletal muscle. Input feeds were fructose-6-phosphate and ATP with low concentrations of phosphate as buffer. Oscillations in pH, sustained for over eight hours, were observed. A six-step mechanism, including product activation and substrate inhibition, seven concentration variables, and four enzymes sufficed simulate the pH oscillations observed in the UCSTR.lld:pubmed
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pubmed-article:8061224pubmed:authorpubmed-author:TornheimKKlld:pubmed
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pubmed-article:8061224pubmed:authorpubmed-author:HockerC GCGlld:pubmed
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pubmed-article:8061224pubmed:volume51lld:pubmed
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pubmed-article:8061224pubmed:pagination21-35lld:pubmed
pubmed-article:8061224pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:8061224pubmed:year1994lld:pubmed
pubmed-article:8061224pubmed:articleTitleGlycolytic pH oscillations in a flow reactor.lld:pubmed
pubmed-article:8061224pubmed:affiliationDepartment of Chemistry, Brandeis University, Waltham, MA 02254-9110.lld:pubmed
pubmed-article:8061224pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:8061224pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
pubmed-article:8061224pubmed:publicationTypeResearch Support, U.S. Gov't, Non-P.H.S.lld:pubmed