Now showing items 21-30 of 50
Newly discovered activities for calcitriol (1,25-dihydroxyvitamin D 3 ): Implications for future pharmacological use
(Wiley Subscription Services, Inc., A Wiley Company, 1986-02)
Recent studies have yielded new insights into the critical importance of adequate vitamin D 3 intake and metabolism. Investigations of the actions of 1,25-dihydroxyvitamin D 3 (calcitriol) on novel target tissues has ...
Inter-specific hybridization underlies phenotypic variability in Daphnia populations
(Springer-Verlag, 1986-03)
In the glacial lakes of the Palaearctic three species of Cladocera commonly coexist: Daphnia hyalina, D. galeata , and D. cucullata . Frequently these populations contain not only animals which are morphologically typical ...
Rules of retinotectal mapmaking
(Wiley Subscription Services, Inc., A Wiley Company, 1986-10)
The selective connections that nerve cells make to each other and to effector and receptor cells outside the nervous system are essential to organized behavior. The retinotectal projection has been used frequently in the ...
A new negative control gene for amino acid biosynthesis in Saccharomyces cerevisiae
(Springer-Verlag, 1986-03)
Enzyme levels in multiple amino acid biosynthetic pathways in yeast are coregulated. This control is effected largely at the transcriptional level by a number. of regulatory genes. We report the isolation and characterization ...
Reinvestigation of the roles of the carboxyl groups of glutathione with yeast glyoxalase I : Implications as to the mechanism and coenzymic role of glutathione
(Elsevier, 1986-07-07)
A number of carboxyl-substituted s-blocked glutathiones have been shown to be competitive inhibitors of yeast glyoxalase I at 25[deg]C, pH 6.6. Amidation of the glycyl carboxyl group of S-(p-bromobenzyl)glutathione has no ...
Madin-Darby canine kidney cells display type I and type II insulin-like growth factor (IGF) receptors
(Elsevier, 1986-01-14)
Using affinity cross-linking techniques, we report the presence of type I IGF and type II IGF receptors in Madin-Darby canine kidney cells, a line of cells lacking insulin receptors. The IGF receptors were further characterized ...
Lack of first-pass metabolism of ethanol at blood concentrations in the social drinking range
(Elsevier, 1986-08-04)
Previously published data are displayed in a new manner and show that there is complete systemic availability of oral doses of 23-47 g of ethanol (0.35-0.75 g/kg or 30-60 ml of 95% ethanol) in man when administered in the ...
Evidence that the subunit structure of gonadotropin receptor is preserved during regression of rat corpus luteum
(Elsevier, 1986-05-29)
The level of hCG/LH receptor has been shown to undergo marked changes during the life span of rat corpus luteum. To evaluate whether these fluctnations are due to changes in the receptor subunit structure or receptor protein ...
GTP and cytosol stimulate phosphoinositide hydrolysis in isolated platelet membranes
(Elsevier, 1986-06-13)
Hydrolysis of polyphosphoinositides by phospholipase C was examined in isolated membranes prepared from [32P]labelled platelets. In the presence of GTP[gamma]S, thrombin increased the release of inositol triphosphate and ...