Now showing items 11-20 of 33
Temperature-sensitive revertants
(Elsevier, 1971-12-03)
About 50% of a series of non-temperature-sensitive, spontaneously revertable auxotrophs of Escherichia coli showed temperature-sensitive revertants when the selection was at 25[deg] rather than at 37[deg]. This procedure ...
Hypoglycemic action of 2-aminonorbornane-2-carboxylic acid in the rat
(Elsevier, 1971-07-02)
SummaryCorrect orientation of the amino and carboxyl groups and of the bicyclic ring of the compound 2-aminonorbornane-2-carboxylic acid is essential for its induction of a tolbutamide-potentiated hypolycemia in the rat, ...
Intersyngenic variations in the esterases of bacterized Paramecium aurelia
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-04)
The esterase isozymes were surveyed in bacterized stocks representative of all 14 syngens of Paramecium aurelia by starch gel electrophoresis. The properties of substrate specificity and independent variation of particular ...
Reduction of alkyl hydroperoxides to alcohols: Role of rubredoxin, an electron carrier in the bacterial hydroxylation of hydrocarbons
(Elsevier, 1971-08-20)
Alkyl hydroperoxides are reduced to alcohols in the presence of DPNH and homogeneous rubredoxin and rubredoxin-DPN reductase from . The reaction does not occur when TPNH is substituted for DPNH or when rubredoxins from ...
Intersyngenic variations in the esterases of axenic stocks of Paramecium aurelia
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-04)
The esterase isozymes were surveyed in axenic stocks of syngens 1, 2, 4, 5, 6, and 8 of Paramecium aurelia by starch gel electrophoresis. In paramecia there appear to be four types of esterases which are clearer in axenic ...
Intersyngenic variations in the esterases and acid phosphatases of Tetrahymena pyriformis
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-04)
The esterase and acid phosphatase isozymes were surveyed in strains of syngens 2–12 under conditions found to be optimal for syngen 1. Both intersyngenic and intrasyngenic variations were found. Comparisons of the esterases ...
The effect of cobalt chloride administration on the synthesis of hepatic microsomal cytochrome P-450
(Elsevier, 1971-02-19)
Cobalt chloride administration to rats stimulates erythropoesis but inhibits the synthesis of hepatic microsomal P-450 and ethylmorphine N-dealkylase activity by hepatic microsomes. No effect on NADPH-cytochrome c reductase ...
Comments on "the interpretation of the EPR and Mossbauer spectra of two-iron, one-electron iron-sulfur proteins"
(Elsevier, 1971-12-03)
Evidence is presented indicating that the note mentioned in the title is incorrect in two important aspects. 1.) According to our results of ENDOR spectroscopy and computer simulations of Mossbauer spectra, the conclusions ...
Evidence for nonrandom multiplicity of gene products in 22 plant genera
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-06)
Correlations in the number (multiplicity) of molecular forms among 10 enzymes have been estimated from a sample of plants representing 22 genera. Significant correlations in multiplicity among some of the 10 enzyme systems ...
A sex-limited serum protein variant in the mouse: Hormonal control of phenotypic expression
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-04)
The sex-limited protein (Slp) antigen of the mouse is first detected in the serum of strain DBA/2J males at 5–6 weeks of age and reaches full adult levels by 10 weeks. This antigen is normally absent in females. Immature ...