TY - JOUR A1 - Jeck, Reinhard A1 - Woenckhaus, Christoph A1 - Holý, Antonin T1 - Interaction between dehydrogenases and a new NAD⊕-isomer T2 - Zeitschrift für Naturforschung, C N2 - A new NAD⊕-isomer was prepared, in which the ᴅ-ribose of the adenosine moiety was sub­ stituted by the enantiomeric ʟ-ribose. As compared to nicotinamide-adenine-dinucleotide (NAD⊕) and NADH the coenzyme isomer (ᴅ,ʟ)-NAD⊕ and its dihydroform (ᴅ,ʟ)-NADH are far less tightly bound to lactate dehydrogenase and alcohol dehydrogenase from horse liver. In the presence of the second substrate (ᴅ,ʟ)-NAD⊕ and (ᴅ,ʟ)-NADH act as hydrogen acceptor and hydrogen donator, respectively, with lactate dehydrogenase and alcohol dehydrogenases from horse liver and yeast. Compared to NAD⊕ and NADH the Michaelis constants are always increased, the catalytic constants (V/Et) were found to be decreased except for the dihydroform reacting with alcohol dehydrogenase from liver. KW - NAD⊕-Isomer KW - Dehydrogenase KW - Complex Formation Y1 - 2014 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/72141 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-721419 SN - 0939-5075 SN - 1865-7125 VL - 30.1975 IS - 11-12 SP - 734 EP - 738 PB - Verlag der Zeitschrift für Naturforschung CY - Tübingen ER -