Recently, [Doyle and McMullen 1989] devised an iterative solution to the fifth degree polynomial. At the method’s core is a rational mapping f of CP with the icosahedral symmetry of a general quintic. Algebraically, this means that f commutes with a group of Möbius transformations that is isomorphic to the alternating groupA5. Moreover, thisA5-equivariant posseses nice dynamics: for almost any ...

Adrenal steroids induce an increase in transcellular Na+ reabsorption across Xenopus laevis A6 cell epithelia that requires the action of transcriptionally regulated gene products. In a previous study we identified K- ras2 as an aldosterone-upregulated mRNA in A6 epithelia. Here, we show that in vivo injection of aldosterone in Xenopus (2.5 h) increases K- ras2 mRNA specifically in the kidney (...

Oxygen radicals play an important role in signal transduction and have been shown to influence epithelial sodium channel (ENaC) activity. We show that aldosterone, the principal hormone regulating renal ENaC activity, increases superoxide (O2*) production in A6 distal nephron cells. Aldosterone (50 nM to 1.5 microM) induced increases in dihydroethidium fluorescence in a dose-dependent manner in...

Monoclonal antibodies were obtained by the classic hybridoma technique with lymphocytes of BALB/c mice immunized with formalin killed Listeria monocytogenes cells. Among 1000 hybridomas issued from the fusion, four monoclonal antibodies (mAbs A6 A E4, C10 A F7, G4 A D6, G7 A D5) gave interesting results. By Western-blot analysis with various soluble extracts of different Listeria species, the f...

? Diese Arbeit entstand im Teilprojekt A6 des SFB 342 der Deutschen Forschungsge-meinschaft.

Abstract The extensive agricultural feedlot operations in the Neuse River Watershed (NRW) North Carolina result high nutrient loading, particularly of ammonium (NH 4 + ). In September 2018, Hurricane Florence devastated large portions NRW, creating a unique opportunity to study impact such hydrological events on biogeochemistry riverine and riparian sediments. NH concentrations, naturally acidi...

The CD45 transmembrane protein tyrosine phosphatase plays an essential role in lymphocyte activation. In humans, CD45 is composed of five isoforms that are generated by alternative splicing of three exons of a common precursor mRNA. Expression of the smallest molecular mass 180-kD CD45 isoform (CD45-O) results from splicing out of exons 4(A), 5(B), and 6(C), which encode peptide regions near th...