Cut shoots of guayule (Parthenium argentatum Gray) were treated with four inhibitors of the glycolate pathway (alpha-hydroxypyridinemethanesulfonic acid; isonicotinic acid hydrazide, glycine hydroxamate, and amino-oxyacetate, AOA) in order to evaluate the role of photorespiratory intermediates in providing precursors for the biosynthesis of rubber. Photorespiratory CO(2) evolution in guayule le...

Failure to detoxify the intermediary metabolite glyoxylate in human hepatocytes underlies the metabolic pathology of two potentially lethal hereditary calcium oxalate kidney stone diseases, PH (primary hyperoxaluria) types 1 and 2. In order to define more clearly the roles of enzymes involved in the metabolism of glyoxylate, we have established singly, doubly and triply transformed CHO (Chinese...

In the title compound, C(4)H(10)NO(+)·C(4)H(5)O(6) (-)·H(2)O, the morpholine ring adopts a chair conformation. In the crystal, the tartrate anions are linked via O-H⋯O hydrogen bonds, forming chains propagating along [101]. These chains are linked via N-H⋯O and O-H⋯O hydrogen bonds, involving the morpholinium cation and the water molecule, forming a three-dimensional network.

Isolated soybean leaf mesophyll cells decarboxylated exogenously added [1-(14)C]glycolate and [1-(14)C]glycine in the dark. The rate of CO(2) release from glycine was inhibited over 90% by isonicotinic acid hydrazide and about 80% by KCN, two inhibitors of the glycine to serine plus CO(2) reaction. The release of CO(2) from glycolate was inhibited by less than 50% under the same conditions. Thi...

[reaction: see text] The diastereoselective alkylation of glycolate oxazolidinones has been demonstrated as a method for the enantioselective preparation of alpha-alkoxy carboxylic acid derivatives and selectively protected 1,2-diols. Various protecting groups on the glycolate hydroxyl and multiple substitution patterns on allylic iodides are tolerated in the alkylation. Yields for the alkylati...

Am m onia was excreted at high rates in the presence of L-methionine sulfoximine (L-MSO) from Chlorella cells which have been grown and analyzed at normal C 0 2 partial pressure (330 ppm). If these cells are analyzed at high C 0 2-concentration (3% C 0 2 in air) only little ammonia is excreted in the presence o f L-MSO. In the absence of L-MSO no ammonia is excreted under either condition. In a...

Yoshihiro Shiraiwa and Georg H. Schmid Universität Bielefeld, Fakultät für Biologie, Lehrstuhl Zellphysiologie, D-4800 Bielefeld 1, Bundesrepublik Deutschland Z. Naturforsch. 42c, 525—529 (1987); received December 5, 1986 Ammonia Excretion, Glycolate Excretion, Chlorella vulgaris, Photorespiration, pH-Effect The effect of pH changes on the excretion of ammonia and glycolate from algal cells int...