منابع مشابه
Pteridines in blue green algae.
The presence of a remarkably high concentration of pteridiineS in the blue green alga, Anacystis nidulanis 5, wvas demonstrated by Forrest, van Baalen, and Myers in 1957 (2). A number of (lifferent pteridines were then isolated and ideentifie(l. These included 2-amino-4-hydroxypteridine, 2,6-diamino-4-hydroxypteridline (10), a yellow pteridine assigned the structure 2-aimino-4-hydroxv-6-propion...
متن کاملPhotooxidation by Pteridines'
Suinizary. A nunibl)er of pteridfines were examined( for activity in promotinig photop)hosphorylation in broken spinach chlioroplasts anid in stimlulating cvtochrome c photooxidation ill sonicated chloroplasts. Correlation was fouind between activities for the 2 reactions. Photophosphorylation promoted by pteridines was inhibited by DCMU and by anaerobic conditiolns. It is concluded that pterid...
متن کاملPteridines in the assessment of neoplasia.
Biological processes which might explain the association of pteridine excretion with proliferation are still unknown. Difficulties in the analysis and the determination of naturally occurring pteridines are described. The best quantitative estimations were achieved when measurement of non-reduced forms was attempted. The performance characteristics of such a method for neopterin by high perform...
متن کاملThe excretory role of pteridines in insects.
In 1895, Hopkins described the white and yellow wing pigments of Pieridae as ' . . .excretory substances which function in ornament...' (Hopkins, 1895). ^ those days, it was generally recognized that purines, especially uric acid, were excretory products. Hopkins thought that the white substance was uric acid and that the yellow one was a derivative. In 1925 Wigglesworth still believed the wing...
متن کاملThe transformation of purines into pteridines.
Lipmann, F., Jones, M. E., Black, S. & Flynn, R. M. (1952). J. Amer. chem. Soc. 74, 2384. Lipmann, F. & Tuttle, L. C. (1945). J. biol. Chem. 161, 415. Lynen, F. & Ochoa, S. (1953). Biochim. biophys. Acta, 12, 299. Meijbaum, W. (1939). Hoppe-Seyl. Z. 258, 117. Ohlmeyer, P. (1938). Biochem. Z. 297, 66. Oliver, I. T. (1953). Cited by Bartley, W. & D)avies, R. E. (1954). Biochem. J. 57, 37. Parker,...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1958
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.44.3.239