Although the anticodon is the primary element in Escherichia coli tRNAValfor recognition by valyl-tRNA synthetase (ValRS), nucleotides in the acceptor stem and other parts of the tRNA modulate recognition. Study of the steady state aminoacylation kinetics of acceptor stem mutants of E.coli tRNAValdemonstrates that replacing any base pair in the acceptor helix with another Watson-Crick base pair...

Recent studies have shown that saturable high-capacity nuclear binding sites (termed acceptor sites) for the avian oviduct progesterone receptor can be reconstituted by rehybridizing a specific oviduct chromatin protein fraction (CP-3) to pure hen DNA to generate a reconstituted nucleoacidic protein (NAP). Only a limited number of acceptor sites can be generated on hen DNA even at high protein/...

The third-order NLO properties of A–D–A molecules originally derived from organic photovoltaic (OPV) devices are studied. results show that performance planar molecule (O-IDTBR) is better than twisted (IDFBR) in solution or film state.

Based on the existing structure activity relationship for proteasome inhibitors, a number of substituted aryl-2-nitrovinyl derivatives have been synthesized as Michael acceptor and their cytotoxicity and proteasome inhibitory effects were evaluated on two cancer cell lines. Compound 2d exhibited IC50 values of 0.71 and 17.79 μM comparable to bortezomib against MCF-7 and PC-3, respectively. The ...

In this study, hollow fiber liquid phase microextraction (HF-LPME) coupled with highperformanceliquid chromatography (HPLC) with UV detection was applied for preconcentrationand determination of Diclofenac sodium in biological fluids. Parameters affecting the extractionprocess including pH of donor phase and acceptor phase, type of extraction solvent, stirring rate,extraction time, and salt add...

new statistic based models provide a wide area of prediction equipments for different science areas. among these fields biology have just entered the contest of interdisciplinary sciences. drug discovery is a long and expensive process which could be decreased with theoretical approaches. in this study, 500 reported assayed anti cancer molecules were extracted from science direct articles, sket...

A donor-acceptor covalent organic framework (COF), TB-COF, constructed from an electron-rich building unit (donor) and electron-deficient (acceptor), was developed as a promising photothermal agent for therapy (PTT). Upon laser irradiation, significant photoinduced electron transfer (PET) occurs between the donor acceptor in converting absorbed optical energy to thermal resulting ablation of tu...

Hydrogen bonding represents one of the primary interactions controlling chemical structure and reactivity. The properties of H-bonds are predicted to vary with the distance between the H-donor and H-acceptor, Figure 1, from a canonical structure (>2.5 Å, Figure 1A), in which the proton resides within a double welled structure, to one in which the proton has become fully delocalized within a sin...