Results 91 to 100 of about 53,051 (335)
Synthesis of N-7-Substituted Purines from Imidazole Precursors
Molecules, 1999 Synthesis of purines and purine mono-1-oxides from the respective 5-substituted 4-nitroimidazole derivatives is described. The commercially available 4-nitroimidazole, in a few simple steps (including Vicarious Nucleophilic Substitution of Hydrogen), was
Stanislaw Ostrowski
doaj +1 more source
Relaxing the Hypotheses of Symmetry and Time-Reversibility in Genome Evolutionary Models [PDF]
British journal of mathematics and computer science. 5(4), 439-455
(2015), 2016 Various genome evolutionary models have been proposed these last decades to predict the evolution of a DNA sequence over time, essentially described using a mutation matrix. By essence, all of these models relate the evolution of DNA sequences to the computation of the successive powers of the mutation matrix.
arxiv
Food Science &Nutrition, Volume 11, Issue 1, Page 350-363, January 2023., 2023 Traditional Iranian butter samples were collected from different parts of Iran and were screened for the presence of Lactic acid bacteria. The selected LAB were identified to species level by biphasic approach. The ability of selected LAB to lower the cholestrol both in vitro and in situ was then determined.
Mahbubeh Ostadzadeh +2 more
wiley +1 more source
Modification of Purine and Pyrimidine Nucleosides by Direct C-H Bond Activation
Molecules, 2015 Transition metal-catalyzed modifications of the activated heterocyclic bases of nucleosides as well as DNA or RNA fragments employing traditional cross-coupling methods have been well-established in nucleic acid chemistry.
Yong Liang, Stanislaw F. Wnuk
doaj +1 more source
Predicting the Evolution of Gene $ura3$ in the Yeast Saccharomyces Cerevisiae [PDF]
arXiv, 2017 Since the late `60s, various genome evolutionary models have been proposed to predict the evolution of a DNA sequence as the generations pass. Most of these models are based on nucleotides evolution, so they use a mutation matrix of size 4x4. They encompass for instance the well-known models of Jukes and Cantor, Kimura, and Tamura.
arxiv
American Journal of Medical Genetics Part B: Neuropsychiatric Genetics, EarlyView.ABSTRACT Schizophrenia is a neurodevelopmental psychiatric disorder characterized by symptoms of psychosis, thought disorder, and flattened affect. Immune mechanisms are associated with schizophrenia, though the precise nature of this relationship (causal, correlated, consequential) and the mechanisms involved are not fully understood.
David Stacey +6 more
wiley +1 more source
Proteogenomic characterization of cholangiocarcinoma
Hepatology, EarlyView., 2022 Proteogenomic characterization of cholangiocarcinoma with therapeutic strategies Abstract Background and Aims Cholangiocarcinoma (CCA) is a highly heterogeneous cancer with limited understanding and few effective therapeutic approaches. We aimed at providing a proteogenomic CCA characterization to inform biological processes and treatment ...
Mengjie Deng +18 more
wiley +1 more source
Synthesis and fluorescent properties of N(9)-alkylated 2-amino-6-triazolylpurines and 7-deazapurines
Beilstein Journal of Organic Chemistry, 2019 The synthesis of novel fluorescent N(9)-alkylated 2-amino-6-triazolylpurine and 7-deazapurine derivatives is described. A new C(2)-regioselectivity in the nucleophilic aromatic substitution reactions of 9-alkylated-2,6-diazidopurines and 7-deazapurines ...
Andrejs Šišuļins +8 more
doaj +1 more source
Possible traces of resonance signaling in the genome [PDF]
arXiv, 2019 Although theories regarding the role of sequence-specific DNA resonance in biology have abounded for over 40 years, the published evidence for it is lacking. Here, the authors reasoned that for sustained resonance signaling, the number of oscillating DNA sequences per genome should be exceptionally high and that, therefore, genomic repeats of various ...
arxiv