Theologica Paradoxa

A PAPS-Dependent Sulfotransferase in Cyanophora paradoxa

A 3'-phosphoadenosine-5'-phosphosulfate (PAPS) dependent sulfotransferase was partly purified from Cyanophora paradoxa. This enzyme has a pH-optimum of 8.5 and was found to be specific for P A P S ; the K m for this nucleotide was determined to be 8.3 juu. In crude extracts monothiols like glutathione, mercaptoethanol, or cysteine catalyzed a rate of about 80% of the rate obtained with dithioer...

Observations on a case of myotonia paradoxa.

Cyanophora paradoxa: Fatty Acids and Fatty Acid Synthesis in vitro

Cyanophora paradoxa, Cyanelles, Fatty Acid Pattern, Fatty Acid Synthesis in vitro The fatty acid pattern of Cyanophora paradoxa membrane lipids is highly unusual with 16:0, 20:3 and 20:4 as the main acids. The 20:4 acid is preferentially distributed among the cyanelle lipids. In isolated cyanelles a relatively low in vitro synthesis of only saturated and monounsatu­ rated fatty acids from [l-14...

Triazine Resistance in Phalaris paradoxa: Physiological and Molecular Analyses

Herbicide Resistance, Photosystem II, psbA G ene, Photosynthesis, Chloroplast, Phalaris para­ doxa Triazine resistance in a mutant biotype of Phalaris paradoxa is accompanied by changes in the chlorophyll fluorescence induction curve, and by reduced quantum yield for electron transport, indicating altered photosystem II activity. H owever, light-saturated rates of electron transport in isolated...

Respiratory function in the South American lungfish, Lepidosiren paradoxa (Fitz).

Few animal species have aroused as much excitement upon their discovery as the South American lungfish. Its possession of distinct piscine as well as amphibian characters made the animal a link in the transition of vertebrate life from water breathing to air breathing. Its special attributes are clearly reflected in its name, Lepidosiren paradoxa. Physiological experimentation on respiratory fu...