Intimate coupling of creatine phosphokinase and myofibrillar adenosinetriphosphatase.
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Adenosine Triphosphatases↗
Biomedical subjects
P J Geiger
Publications and source records attributed to P J Geiger.
Acid-soluble precursors and derivatives of phospholipids increase after stimulation of quiescent Swiss 3T3 mouse fibroblasts with serum.
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Adenosine Triphosphate↗
Compartmentation of hexokinase and creatine phosphokinase, cellular regulation, and insulin action.
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Adenosine Triphosphate↗
Identification of components of phospholipids metabolism in automated phosphate ester chromatography.
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Animals↗
Comparative analysis of chromatography peaks by computer and disc-integrator.
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Animals↗
Formation of creatine phosphate from creatine and 32P-labelled ATP by isolated rabbit heart mitochondria.
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Adenosine Triphosphate↗
Separation and automated analysis of phosphorylated metabolic intermediates.
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Acetone↗
Isozymes of phenylalanine hydroxylase.
Three isozymes of phenylalanine hydroxylase exist in adult rat liver. They are chromatographically unique. Partial chracterization suggests that they are similar in chemical properties and differ only in charge. Estimation of the Stokes radii indicates that the isozymes have similar molecular weights of about 200,000. Two isozymes exist in human fetal liver. Alterations of the relative amounts of these isozymes may control the phenotype of the disease phenylketonuria.
Animals↗
Protein determination by Lowry's method in the presence of sulfhydryl reagents.
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Animals↗
Measurement of CO(2) Assimilation in Soils: an Experiment for the Biological Exploration of Mars.
A method is described for the measurement of CO(2) assimilation by microorganisms in soils. A determination involves exposing soil to CO(2), pyrolyzing the exposed soil, trapping the organic pyrolysis products on a column of firebrick coated with CuO, combusting the trapped organics by heating, and measuring the radioactivity in the CO(2) produced in the combustion. The detection of significant levels of C in the trapped organic fraction appears to be an unambiguous indication of biological activity. The CO(2) which is adsorbed or exchanged into soils by nonbiological processes does not interfere. The method easily detects the CO(2) fixed by 10 to 10 algae after light exposure for 3 to 24 hr. Assimilation of C is also demonstrable in dark-exposed soils containing 10 to 10 heterotrophic bacteria. Possible applications of the method in the biological exploration of Mars are discussed.
Journal Article↗
Sterile soil from Antarctica: organic analysis.
Soils from the dry-valley region of Antarctica can be sterile by the usual microbiological criteria and yet contain significant amounts of organic carbon. Examination of one such soil shows that the organic material is finely divided anthracite coal. These findings have significant implications for the biological exploration of Mars.
Antarctic Regions↗