1. A phosphatase that hydrolyses sucrose phosphate (phosphorylated at the 6-position of fructose) was isolated from sugar-cane stem and carrot roots. With partially purified preparations fructose 6-phosphate, glucose 6-phosphate, fructose 1-phosphate, glucose 1-phosphate and fructose 1,6-diphosphate are hydrolysed at between 0 and 2% of the rate for sucrose phosphate. 2. The activity of the enz...

The cells of higher plants, in contrast with those of other organisms, contain relatively large amounts of organic acids. Krebs & Lowenstein (1960) calculated that the concentrations of individual organic acids in Escherichia coli are about 0-01 mM, in liver or kidney cells 0 1 mm, and in yeast cells 1 mm. By using the same type of calculation it can be estimated that many plant tissues contain...

Paraffins are fotund in almost every organism, plants (2), animals (13), and microorganismiis (14). The most common biological source of paraffins appears to be the surface lipids of plants (2), the chain length of the most abulndant paraffin being most often C., or C.:. These natural paraffins cant be readily catabolized by soil organisms (5) and to a limited extent bv an,inlals (6). The mecha...

Red beet root discs aerated in potassium phosphate for 2 to 3 days and young spinach leaves actively produce oxalate. A series of labeled compounds was supplied to each of these tissues to determine the extent of conversion to oxalate. Similar results were obtained with the 2 tissues except that in the leaf tissue glyoxylate and glycolate were outstandingly good precursors. Carbon from glucose,...

as far as possible. The precautions described above have been found to be necessary in order to achieve this. It was thought at first that a certain amount of hydrogen chloride, as well as carbon dioxide, would diffuse into the alkali. Accordingly, ION-phosphoric acid was tried instead of hydrochloric acid, but this did not liberate all the carbon dioxide, even after heating for 24 hr. at 1500....