منابع مشابه
The action of magnesium and calcium on the enzymic breakdown of certain adenine compounds.
The initial breakdown of adenosine and its phosphorylated derivatives is brought about by deamination or by dephosphorylation. Deaminases for these compounds are widely distributed in the tissues although in some organs (e.g. liver) they act only after dephosphorylation (Conway & Cooke, 1939). The influence of Mg++ on such deaminases has not been studied in great detail. Ostern & Mann (1933) cl...
متن کاملEnzymic Mechanism of Starch Breakdown in Germinating Rice Seeds: 8. Immunohistochemical Localization of beta-Amylase.
Rabbit antiserum against beta-amylase isolated from germinating seeds of rice was produced, and its specific cross-reactivity with beta-amylase was confirmed by means of Ouchterlony double immunodiffusion and immunoelectrophoresis procedures. The cellular localization of beta-amylase was studied by indirect fluorescence microscopy of thin sectioned germinating rice seed specimens (1-day stage) ...
متن کاملEnzymic mechanism of starch breakdown in germinating rice seeds I. An analytical study.
Time-sequence analyses of carbohydrate breakdown in germinating rice seeds shows that a rapid breakdown of starch reserve in endosperm starts after about 4 days of germination. Although the major soluble carbohydrate in the dry seed is sucrose, a marked increase in the production of glucose and maltooligosaccharides accompanies the breakdown of starch. Maltotriose was found to constitute the gr...
متن کاملEnzymic mechanisms of starch breakdown in germinating rice seeds: 7. Amylase formation in the epithelium.
The time sequence analysis of the starch digestion pattern of the thin sectioned germinating rice (Oryza sativa L.) seed specimens using the starch film method showed that at the initial stage amylase activity was almost exclusively localized in the epithelium septum between the scutellum and endosperm. Starch breakdown in the endosperm tissues began afterward; amylase activity in the aleurone ...
متن کاملEnzymic Mechanism of Starch Breakdown in Germinating Rice Seeds II. Scutellum as the Site of Sucrose Synthesis.
In a close parallel to the developmental pattern of alpha-amylase activity, a rapid increase of maltase activity occurred in the endosperm tissue of germinating rice seeds after about 4 days of the seed imbibition. The overall pattern of the 2 hydrolytic enzyme activities strongly suggest that amylolytic breakdown is the major metabolic route of starch utilization in the germinating rice seeds....
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1947
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.01-0422