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Pyrimidines
Published in Mihai V. Putz, New Frontiers in Nanochemistry, 2020
Nicoleta A. Dudaş, Mihai V. Putz
Besides pyrimidine and purine nitrogenous bases from DNA and RNA (cytosine, thymine, uracil, adenine, guanine) there are many compounds containing the pyrimidine core which can be found in important classes such as vitamins or α-amino acids. Among them there are: thiamine (vitamin B1), riboflavin (vitamin B2), folic acid (vitamin B9), orotic acid (vitamin B13) and the nonproteogenic α-amino acid willardiine extracted from the seeds of various species of Acacia sp. and lathyrine (tingitanine) extracted from Lathyrus tingitanus (Figure 41.1) (Dudaş & Putz, 2014; McDowell, 2000; Lanska, 2009; Hoffbrand & Weir, 2001; Lagoja, 2005; Gmelin, 1959; Bell, 1961; Bell & Foster, 1962).
Saccharomyces cerevisiae
Published in Shakeel Ahmed, Aisverya Soundararajan, Pullulan, 2020
Orotidine-5-monophosphate (OMP) is involved in pyrimidine synthesis [4, 25, 32]. Decarboxylation of orotidine-5-monophosphate to uridine monophosphate is often used as a selection marker for the URA3 gene [3, 7, 18]. The orotidine-5-monophosphate (OMP) enzyme is thought to be a single function enzyme, and mutations can lead to autotrophy of uracil [32]. Thus, OMP decarboxylase enzyme activity can be quantitated, and 5-fluoro-orotic acid (5-FOA) can be added to agar to select for mutant revertants [7, 36, 46].
A new Cd-coordination polymer based on 1,3-di(4-pyridyl)propane: synthesis, crystal structure, thermogravimetric analysis, and photoluminescent properties
Published in Journal of Coordination Chemistry, 2020
Ashok Kumar Bharati, M. Fátima C. Guedes da Silva, Kafeel Ahmad Siddiqui
All chemicals CdI2, 1,3-di(4-pyridyl)propane, orotic acid (2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid), 25% ammonia solution, and dimethylformide were of reagent grade, commercially available (Sigma Aldrich) and used without prior purification. C, H, and N elemental analyses were carried out with a Perkin-Elmer 2400 CHN element analyzer. FTIR spectra were recorded as KBr pellets on a Bruker Alpha spectrometer from 4000 to 400 cm−1. Powder X-ray diffraction (PXRD) patterns were obtained on a PANalytical 3 kW X’pert Powder XRD—Multifunctional with Cu Kα radiation (λ = 1.5405 Å). A TGA Q500 V6.7 Build 203 instrument was used for the TG-DTA analysis. Photoluminescence (PL) measurements were taken at room temperature in a FLS980 Spectrofluorimeter (Edinburgh Instruments) equipped with a continuous Xe lamp and S900 photomultiplier operating within 180-870 nm.