Results 41 to 50 of about 10,390 (256)

Pteridine levels and head weights are correlated with age and colony task in the honey bee, Apis mellifera [PDF]

PeerJ, 2016
Background. The age of an insect strongly influences many aspects of behavior and reproduction. The interaction of age and behavior is epitomized in the temporal polyethism of honey bees in which young adult bees perform nurse and maintenance duties ...
Frank D. Rinkevich, Joseph W. Margotta, Jean M. Pittman, James A. Ottea, Kristen B. Healy   +4 more
doaj   +2 more sources

Difference of DNA Compaction Performed by Two kinds of Oncopterin-Mimic Pteridine - Polyamine Conjugates

Pteridines, 2006
Two types of pteridine - polyamine conjugates designed on oncopterin perform different actions to DNA. The most obvious difference is their actions in DNA compaction. One of the pteridine - polyamine conjugates, PT- 2R, containing a polyamine substituent
Murata Shizuaki, Chen Ning
doaj   +1 more source

Widespread occurrence of glyceryl ether monooxygenase activity in rat tissues detected by a novel assay

Journal of Lipid Research, 2007
An assay was set up for glyceryl ether monooxygenase activity in tissue samples using the novel substrate 1-O-pyrenedecyl-sn-glycerol and high-performance liquid chromatographic analysis of reaction mixtures with fluorescence detection, allowing robust ...
Ernst R. Werner, Albin Hermetter, Helmut Prast, Georg Golderer, Gabriele Werner-Felmayer   +4 more
doaj   +1 more source

A Simple and Convenient Method for the Synthesis of 1-Methyl-7-arylfuro[3,2-g]pteridine-2,4(1H,3H)-diones and Their Substituted Derivatives

Acta Chimica Slovenica, 2020
A simple and effective method for the synthesis of unknown 1-methyl-7-arylfuro[3,2-g]pteridine-2,4(1H,3H)-diones by dehydration of the corresponding 1-methyl-6-phenacyl-pteridine-2,4,7(1H,3H,8H)-triones is reported in the article. It was shown that their
Maxim Stanislavovich Kazunin, Oleksii Yurievich Voskoboynik, Svetlana Valentynivna Shishkina, Oleksii Mykolayovych Antypenko, Sergey Ivanovich Kovalenko   +4 more
doaj   +1 more source

Glyceryl-Ether Monooxygenase [EC 1.14.16.5J Part VIII. Probing the Nature of the Active Site

Pteridines, 1995
The V /K kinetic parameters for glyceryl-ether monooxygenase with 3-1 '-n-alkoxypropane-I,2-diols having alkyl sidechains varying from Cll to C22 (lb-k, 2a and b, and 3d) were determined. Maximum activity was found with the CI6 ethers, dropping almost to
Taguchi Hiroyasu, Paal Bela, Armarego Wilfred L.F.   +2 more
doaj   +1 more source

Trypanosoma brucei DHRF-TS revisited:characterisation of a bifunctional and highly unstable recombinant dihydrofolate reductase-thymidylate synthase [PDF]

, 2016
Bifunctional dihydrofolate reductase–thymidylate synthase (DHFR-TS) is a chemically and genetically validated target in African trypanosomes, causative agents of sleeping sickness in humans and nagana in cattle.
A Dawson, A El Fadili, A Khodursky, AJ Wahba, AJ Wahba, AL Jackman, Alan H. Fairlamb, B Nare, BJ Dolnick, C Fraser-Lhostis, C Shih, CJ Allegra, CW Carreras, D Spinks, DC Jones, E Wirtz, EJ Shanks, EL White, F Gamarro, FW Studier, H Zhang, Han B. Ong, HB Ong, J Phan, J Yuvaniyama, JA Frearson, Jayne Raper, JF Morrison, JM Blaney, JR Appleman, K Al Chalabi, KY Han, LM Changchien, LS Torrie, M Berriman, M Hekmat-Nejad, Marc W. Gibson, MM Bradford, N Greig, N Sienkiewicz, N Sienkiewicz, Natasha Sienkiewicz, ND Brunn, P Prapunwattana, P Reche, PH Liang, R Ferone, R Grumont, RA Copeland, RC Jackson, RD Walter, RJ Bonney, RJ Cisneros, S Shallom, SA Margosiak, SE Webber, SF Chowdhury, SI Ahmad, Simon Dewar, SM Lanham, TC Eadsforth, TD Meek, TW Synold, Y Cheng   +63 more
core   +3 more sources

First Synthesis of Asperopterin A, an Isoxanthopterin Glycoside from Aspergillus Oryzae [PDF]

, 2013
The key precursor, N-2-(N,N -dimethylaminomethylene)-6-hydroxymethyl-8-methyl-3-[2-(4-nitrophenyl)ethyl]-7-xanthopterin (16) was efficiently prepared from 2,5-diamino-6-methylamino-3H-pyrimidin-4-one (5) and ethyl 3-(tert-butyldimethylsilyloxy)-2 ...
Hanaya, Tadashi, Yamamoto, Hiroshi
core   +1 more source

Age-dependance of pteridines in the malaria vector, Anopheles stephensi

Pteridines, 2017
Determining the accurate age of malaria vectors is crucial to measure the risk of malaria transmission. A group of fluorescent chemicals derived from a pyrimidine-pyrazine ring structure known as pteridines from the head, thorax and whole body of adult ...
Edalat Hamideh, Akhoundi Mohammad, Basseri Hamidreza   +2 more
doaj   +1 more source

How consistent are the transcriptome changes associated with cold acclimation in two species of the Drosophila virilis group? [PDF]

, 2015
This work was financially support by a Marie Curie Initial Training Network grant, “Understanding the evolutionary origin of biological diversity” (ITN-2008–213780 SPECIATION), grants from the Academy of Finland to A.H.
A Hoikkala, A Laiho, A Martin, A Sasson, AA Hoffmann, AL Majumder, AR McCune, B Katz, BJ Sinclair, C Canestro, CJ Reaume, CP Downes, D Arbuthnott, D Bell-Pedersen, D J Parker, DW Huang, DW Huang, FA Loewus, H Colinet, H Colinet, HA MacMillan, J Overgaard, J Zhang, JR Hazel, K Xu, KB Storey, KY Xu, L Kivivuori, L Vesala, L Vesala, L Vesala, LH Throckmorton, M G Ritchie, M Kankare, M Kim, M Reis, M Watanabe, M Watanabe, MC Magnone, MD Robinson, MD Robinson, MJ Fitzpatrick, MK Jones, MV Rockman, NM Teets, PR Senthilan, PW Hochachka, R David, R Morales-Hojas, R Niwa, RE Lee, RE Lee, RM Robich, RW Salt, S Anders, S Fowler, S Sahar, S Tweedie, V Kellermann, V Kostal, V Koštál, V Koštál, Vr Koštál, W Block, W Huang, WJ Heitler, WL Shen, X Huang, XL Guan, Y Benjamini, ZD Liu   +70 more
core   +2 more sources

Blocked dihydropteridines as nitric oxide synthase activators [PDF]

, 2010
It has been shown that 6-acetyl-7,7-dimethyl-5,6,7,8-tetrahydropteridin-4(3H)-one can act as a competent cofactor for the production of nitric oxide by neuronal nitric oxide synthase (nNOS).
Daff, Simon, Gazur, Ben, Gibson, C.L., McInnes, Craig R., Morthala, Raghavendar R., Suckling, C.J.   +5 more
core