Now showing items 11-20 of 33
Stochastic models for an open biochemical system
(Elsevier, 1978-12)
This paper uses the theory of Markov processes to derive stochastic models for a single open biochemical system at steady state under 3 sets of assumptions. The system is a one substrate, one product reaction. Each set of ...
Differential actions of gangliosides on gonadotropin and cholera enterotoxin stimulated adenosine 3':5' cyclic monophosphate dependent protein kinase in isolated rat ovarian cells
(Elsevier, 1978-03-15)
Rat ovarian cells were exposed to cholera enterotoxin, and the effect on progesterone synthesis as well as on protein kinase stimulation was examined. Cholera enterotoxin stimulated ovarian steroidogenesis in a dose dependent ...
In situ study of the glycolytic pathway in Saccharomyces cerevisiae
(Springer-Verlag, 1978-05)
1. The problem of the influence of protein concentration on the kinetic parameters of enzymes has been approached studying the glycolytic enzymes from Saccharomyces cerevisiae in permeabilized cells (in situ). 2. The values ...
Accelerative autoactivation of prostaglandin biosynthesis by PGG2
(Elsevier, 1978-12-29)
Cyclooxygenase catalysis is stimulated by its product, PGG2, and by other lipid hydroperoxides. The endoperoxide, PGH2, was not stimulatory. The results provide a direct demonstration of an essential role for lipid ...
Kynurenine aminotransferase and [alpha]-aminoadipate aminotransferase: III. Evidence for identity with halogenated tyrosine aminotransferase
(Elsevier, 1978-03)
A nearly homogeneous preparation of [alpha]-aminoadipate (kynurenine) aminotransferase exhibited substantial activity with 3,5-diiodo-L-tyrosine, a major substrate for halogenated tyrosine aminotransferase. The new activity ...
Characterization of an orthorhombic crystal form of iron-containing superoxide dismutase from Escherichia coli B
(Elsevier, 1978-08-25)
Crystals suitable for X-ray diffraction studies of iron-containing superoxide dismutase from Escherichia coli have been grown using ammonium sulfate as the precipitant. The space group is P212121 with a = 81.8 A, B = 75.2 ...
Evolution in fine-grained environments I. Environmental runs and the evolution of homeostasis
(Elsevier, 1978-06)
In this paper we discuss the problem of evolution when individual organisms are subjected to heterogeneous environments within their own lifetimes. We first develop a model of environmental heterogeneity in which there are ...
The effect of precursors, products, and product analogs of prostaglandin cyclooxygenase upon iris sphincter muscle
(Elsevier, 1978-09-25)
Contractions of isolated iris sphincter muscles were measured in response to several free fatty acids, hydroperoxy and hydroxy derivatives of 20:3(n-3), 20:3(n-6) and 20:4, PGH2, and the epoxymethano methano analogs of ...
L-threonine dehydrogenase of Escherichia coli K-12
(Elsevier, 1978-11-14)
SummaryA rapid method for purifying L-threonine dehydrogenase from Escherichia coli K-12 cells, grown on a medium containing L-threonine as carbon source, has been developed. The procedure consists of three fractionation ...
Replication in situ and DNA encapsulation following induction of an excision-defective lysogen of Salmonella bacteriophage P22
(Elsevier, 1978-01-25)
The induction of an excision-defective bacteriophage P22 lysogen results in the production of particles which carry a DNA molecule of normal length within a normal capsid, but which are nonetheless defective. The DNA content ...