Results 181 to 190 of about 28,661 (227)

Putrescine transport in human platelets

Biochimica et Biophysica Acta (BBA) - Biomembranes, 1985
Putrescine transport has been studied in human platelets. The uptake of putrescine is saturable and appears to be an energy-dependent process, since it is inhibited by the uncoupler 2,4-dinitrophenol and low temperature. The evidence presented suggests that the uptake process is complex and may be dependent upon pH gradient, membrane potential, and ...
S G, Nadler, M T, Takahashi
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Putrescine and spermidine transport in Leishmania

Molecular and Biochemical Parasitology, 2000
The transport of putrescine and spermidine into Leishmnania donovani promastigotes and Leishmania mexicana promastigotes and amastigotes has been characterised. Polyamine transport was shown to be saturable and temperature-sensitive for both developmental stages of Leishmania.
M, Basselin, G H, Coombs, M P, Barrett
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An enzymatic-isotopic microassay for putrescine

Biochimica et Biophysica Acta (BBA) - General Subjects, 1973
Abstract A highly sensitive enzymatic isotopic microassay procedure for the measurement of putrescine (1,4-diaminobutane) is described. The method depends on the enhancement by putrescine of the decarboxylation of S- adenosyl - L -[carboxy- 14 C ] methionine by baker's yeast (Saccharomyces cerevisiae) S- adenosyl - L ...
S I, Harik, G W, Pasternak, S H, Snyder
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Formation of putrescine and cinnamoyl putrescines in tobacco cell cultures

Phytochemistry, 1981
Abstract A p -fluorophenylalanine- (PFP) resistant cell line of Nicotiana tabacum and wild type cells accumulating high and low levels of cinnamoyl putrescines, respectively, were used to study the formation of putrescine in the biosynthesis of cinnamoyl putrescines.
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Metabolism of putrescine in the pregnant rat

Acta Physiologica Scandinavica, 1981
The in vivo metabolism of14C‐putrescine injected to rats before, during and after pregnancy was studied. Within 30 min of the administration of the isotope 9–12% of the injected radioactivity was recorded as14CO2in the expired air and after 5 h 60% was expired.
A C, Andersson, S, Henningsson
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Putrescine Bisamides from Aglaia gigantea

Journal of Natural Products, 2007
Phytochemical analysis of the leaves of Aglaia gigantea collected in Vietnam yielded three cinnamoyl putrescine bisamide derivatives, which included the known compound dasyclamide ( 1), as well as two new natural products, gigantamide A ( 2) and grandiamide D ( 3). In this study, the structure of dasyclamide ( 1) was confirmed by X-ray crystallography.
Duong, Tu Ngoc, Edrada, RuAngelie, Ebel, Rainer, Wray, Victor, Frank, Walter, Duong, Anh Tuan, Lin, Wen Han, Proksch, Peter, Edrada-Ebel, Ruangelie   +8 more
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Is Putrescine an Essential Nutrient for Avians?

Nutrition Reviews, 2009
Putrescine addition to a complete crystalline amino acid diet elicited a growth response in young chicks, suggesting that putrescine may be an essential nutrient in avians. However, high dietary putrescine levels can depress weight gain.
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THE INCORPORATION OF PUTRESCINE INTO HYOSCYAMINE

Canadian Journal of Chemistry, 1963
Putrescine-1,4-14C was fed to the excised root cultures of Datura metel L., and the alkaloids subsequently isolated. These consisted of hyoscyamine, hyoscine, and a base of undetermined constitution designated as alkaloid X. All three bases were radioactive. Degradation of the hyoscyamine revealed that ca.
J. Kaczkowski, Léo Marion
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Effects of putrescine and inhibitors of putrescine biosynthesis on organogenesis inEuphorbia esula L.

In Vitro Cellular & Developmental Biology - Plant, 1994
Exogenous putrescine (≤5 mM) had little effect on root or shoot formation in aseptically isolated hypocotyl segments of leafy spurge (Euphorbia esula L.) grown on full-strength B5 medium. Unexpectedly, putrescine inhibited root and shoot formation in hypocotyl segments grown on B5 medium diluted 10-fold.
David G. Davis, Prudence A. Olson
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Putrescine, Spermidine, and Spermine

Physiology, 1986
Putrescine was first isolated from putrifying meat and was thought of as a decomposition product;spermine was named from its occurrence in semen. These polyamines, however, are now known to have important roles in cell growth and differentiation. Their physiological significance can be studied by analyzing the consequences of depletion of the cellular
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