Rupert Linder

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A search has been made for corynebacterial phospholipase D, "ovis toxin," a sphingomyelinase (phosphatidylcholine phosphohydrolase, EC 3.1.4.4), among a wide variety of corynebacteria. Phospholipase D activity has been found in strains exhibiting the biochemical properties characteristic of Corynebacterium pseudotuberculosis or of Corynebacterium ulcerans(More)
The toxic, sphingomyelin-specific phospholipase D (phosphatidylcholine phosphatidohydrolase EC 3.1.4.4) from Corynebacterium ovis was purified to near homogeneity. It has a molecular weight of 31 000 and a pI of approx. 9.8. Although not cytolytic itself, it protected red cells from hemolysis by staphylococcal sphingomyelinase (beta-hemolysin) and(More)
Phospholipase B in the venom of the Australian elapid snake, Pseudechis colletti, was purified to near homogeneity. By means of gel filtration it had an Mr of about 35,000, and by SDS-polyacrylamide gel electrophoresis an Mr of about 16,500. These presumably are dimeric and monomeric forms of the enzyme. It was isoelectric at pH 6.2 as compared to 7.8 for(More)
In the presence of N(alpha),N(epsilon)-diacetyl-L-Lys-D-Ala-D-Ala as donor, and either D-[(14)C]alanine, [(14)C]-glycine, or meso-[(3)H]diaminopimelic acid as acceptor, the DD carboxypeptidases from Streptomyces R61 and R39 catalyze a transpeptidation reaction with the release of terminal D-alanine from the donor and the formation of either(More)
A new renal perfusate of modified intracellular electrolyte composition made hyperosmolar with mannitol and requiring no additional additives was successfully used to preserve canine kidneys “ex-vivo” for 48 hours by initial perfusion and hypothermic storage. The new perfusate was also successful in protecting totally ischemic canine kidneys from the lethal(More)
The peptide moiety of the wall peptidoglycan of Escherichia coZi is composed of uncross-linked peptide monomers L-alanyl-y-~glutamyl-(L)-mesodiaminopimelyl-( L) -D-alanine and peptide dimers in which two peptide monomers are linked together through C-terminal D-alanyl( D) -meso-diaminopimelic acid linkages (FIGURE 1). It has been observed previously that(More)
Venoms of the Australian elapid snakes Austrelaps superbus and Pseudechis colletti were analyzed in an electrofocusing column. A. superbus venom, little studied in the past, was found to have a mouse i.p. lethal potency of 0.48 mg/kg and to contain at least four lethal components. Venoms of both species had relatively high direct hemolytic activity for(More)