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Characteristics of rotenone-insensitive oxidation of matrix-NADH by broad bean mitochondria (1978)

Marx, R. ; Brinkmann, K.

Springer

Planta 142 (1978), S. 83-90

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ISSN: 1432-2048

Keywords: Mitochondria ; NADH oxidation ; Rotenone-resistant respiration ; Vicia

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract Mitochondria from Vicia faba L. exhibit two pathways for the oxidation of endogenous NADH. One pathway is rotenone-sensitive and includes three phosphorylation sites, the other one is rotenone-insensitive and by-passes site I. This by-pass is located in the area of flavoproteins, but several lines of evidence suggest that the rotenone-insensitive oxidation of matrix-NADH is not mediated by the external NADH dehydrogenase. With saturating substrate concentrations the two pathways are superimposed in state 3 while in state 4 the electrons are transferred only via the by-pass. The rotenone-resistant electron flux is obviously regulated from the substrate side. We suggest that the function of the by-pass is to regulate the NADH/NAD+ ratio of the matrix space.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00385124

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Comparative investigation on the influence of human bovine collagen types I, II and III on the aggregation of human platelets (1975)

Balleisen, L. ; Gay, S. ; Marx, R. ; [et al.]

Springer

Journal of molecular medicine 53 (1975), S. 903-905

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ISSN: 1432-1440

Keywords: Kollagentypen ; Plättchenaggregation ; Collagen types ; platelet aggregation

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Description / Table of Contents: Summary Collagen types I, II and III from man and calf are distinctly different with respect to their effect on the induction of the aggregation of human platelets. Collagen type III was found to be a particularly potent inducer of platelet aggregation. The pathogenetic implications of these observations are briefly discussed.

Notes: Zusammenfassung Die Kollagentypen I, II and III von Mensch und Kalb weisen in löslicher und strukturierter Form deutliche Unterschiede in ihrer Wirkung auf die Aggregation menschlicher Thrombocyten auf. Eine besonders stark aggregierende Wirkung wurde für das Typ III Kollagen gefunden. Die pathogenetische Bedeutung dieses Befundes wird kurz diskutiert.