The maternal-effect gene fs(1)Ya is specifically required for embryonic mitosis in Drosophila. fs(1)Ya is involved in the initiation of the first embryonic mitosis and may also be necessary for subsequent embryonic mitotic divisions. fs(1)Ya encodes a 91.3 kd hydrophilic protein containing two p...

The Drosophila melanogaster fs(1)Ya gene encodes a nuclear envelope protein needed to initiate embryonic cleavage divisions. In cleavage stage embryos the fs(1)Ya gene product is localized to the nuclear envelope in a cell cycle dependent manner. We show here that fs(1)Ya protein is also present...

Conformational entropy is expected to contribute significantly to the thermodynamics of structural transitions in intrinsically disordered proteins or regions in response to protein/ligand binding, posttranslational modifications, and environmental changes. We calculated the backbone (dihedral) ...

The synthesis of the enantiomers of 2,2-difluoro-2-deoxy-myo-inositol 1,4,5-trisphosphate is reported. L-2,2-difluoro-2-deoxy-myo-inositol 1,4,5-trisphosphate is a potent inhibitor of 3-kinase and 5-phosphatase.

Two synthetic methods for the preparation of boronic acids from their corresponding pinanediol boronate esters are reported. The key to success of the procedures relies on removal of the liberated pinanediol from the reaction mixture.

ABSTRACTIntroductionAngiotensin II (AngII) activates p38 mitogen-activated protein kinase (MAPK) and elevates arginase activity in endothelial cells. Upregulation of arginase activity has been implicated in endothelial dysfunction by reducing nitric oxide (NO) bioavailability. However, signaling...

An improved and efficient entry to highly functionalized β-(2-pyridyl)- and β-(4-pyridyl)alanines and the corresponding 1,4-dihydro and N-oxide derivatives has been developed by one-pot thermal Hantzsch-type cyclocondensation of aldehyde–ketoester–enamine systems in which one of the reagents...

Renin–angiotensin system inhibitors significantly reduce the incidence of arrhythmias. However, the underlying mechanism(s) is not well understood. We aim to test the hypothesis that angiotensin II (Ang II) induces early afterdepolarizations (EADs) and triggered activities (TAs) via the nicotin...

4,5-Anhydro-1-azido-1-deoxy-2,3-O-isopropylidene-D-talitol is a divergent intermediate for the efficient and practical syntheses of 1,4-dideoxy-1,4-imino-D-mannitol, swainsonine and of the ring contracted swainsonines, (1S, 2R, 7R, 7aR)-1,2,7-trihydroxypyrrolizidine and (1S, 2R, 7S, 7aR)-1,2,7-t...

The title amino acid was synthesized in enantiomerically pure form, starting from (S)-(+)-1,2-propanediol 2 in three steps, by condensation of cyclic sulfate 3 with methyl benzylideneglycinate.

(−)-(1S,2R)-Allonorcoronamic acid was synthesized in its enantiomerically pure form from methyl(1S,2R)-1-benzamido-2-[(S)-2,2-dimethyl-1,3-dioxolan-4-yl]cyclopropanecarboxylate, which is easily obtained by methylene insertion on the chiral azlactone derived from 1,2-O-isopropylidene-D-glyceralde...

(−)-(1S,2R)-Allocoronamic acid was synthesized in its enantiomerically pure form by starting from the chiral azlactone derived from 1,2-O-isopropylidene-D-glyceraldehyde in an overall yield of 37 %.

Primary amidations of carboxylic acids 1 or 3 with NH4Cl in the presence of ClCO2Et and Et3N were developed to afford the corresponding primary amides in 22% to quantitative yields. Additionally, we have applied the amidation to the preparation of various amides containing hydroxamic acids and a...

The electroreduction of aromatic β-dimethylcarbamoyl-β-imino esters, prepared from (S)-aspartic acid, in the presence of chlorotrimethylsilane gave five-membered cyclized products, 1-benzoyl-4-hydroxy-5-aryl-N,N-dimethylpyrrolidine-2-carboxamides and 5-(dimethylcarbamoyl)-2-aryl-1H-pyrrol-3-yl...

A new single isomer β-cyclodextrin, the heptakis(2-N,N-dimethylcarbamoyl)-β-cyclodextrin (HDMC-β-CD), has been synthesized and spectroscopically characterized. The outstanding feature of the new neutral β-CD derivatives is their high solubility in water (>100 mM) and methanol. The resolution...

The enantiomerically pure synthesis of [(2′S, 3′S)-bis(hydroxymethyl)pyrrolidin-1-yl] thymine 17 and -adenine 20 was achieved via construction of the base on the 1-amino-pyrrolidine 15, and their anti-HSV-1 and -2, and anti-HIV-1 activities were evaluated.

PI3Kδ, which is mainly expressed in leukocytes, plays a critical role in B-cell receptor mediated signaling pathway and has been extensively studied as a drug discovery target for B cell malignances such as AML, CLL etc. In this manuscript, we report the discovery, SAR optimization and pharmaco...

Doped-poly (aniline-co-para-nitroaniline) (PAN4NA) with a sphere-shaped was synthesized in high acidic medium (pH = 0.55) at room temperature using a facile method. The ratio between aniline and 4-nitro aniline monomer is 1:1. The molecular structure and surface morphology of the resulting doped...

We report our findings for the determination of 4-chloro-N,N-dimethylcathinone (4-CDC), a newly encountered NPS in drug seizures examined in our laboratory, and its differentiation from 4-chloroethcathinone (4-CEC), one of the most common cathinones examined locally, and their respective regiois...

Background: Potential negative outcomes associated with sport-related concussion drive the need for resources to educate parents about prevention, recognition, and management of concussion in the youth athlete. Parents play a critical role in the recognition and management of concussion for thei...