Infrared-Spectroscopic Study of (4-Methylpent-3-en-1-ynyl)methylthiocarbene, Its Photochemical Transformations, and Reactions in an Argon Matrix.
The first representative of singlet carbenes bearing both ethynyl and methylthio groups at the carbene center, (4-methylpent-3-en-1-ynyl)methylthiocarbene, has been generated in a low-temperature Ar matrix upon UV photolysis of 3,3-dimethyl-5-methylthioethynyl-3H-pyrazole and detected by FTIR spectroscopy. The generation of the carbene proceeds via intermediate (3-diazo-5-methylhex-4-en-1-ynyl)methylsulfane. The comparison of FTIR spectroscopy data with the results of quantum…Read More
A hypothesis: Fructosamine-3-Kinase-Related-Protein (FN3KRP) catalyzes deglycation of Maillard intermediates directly downstream from fructosamines
Non-enzymatic glycation (a.k.a. Maillard reaction) is a series of random spontaneous reactions between reducing sugars and amines resulting in the formation of irreversible Advanced Glycation Endproducts (AGE’s). In food chemistry, this process is beneficial by contributing to flavor, aroma, texture and appearance of cooked foods. In vivo, however, Maillard reaction is deleterious because uncontrolled modification…Read More
Analytics of the therapeutic peptide aviptadil by sheathless CE-MS and comparison with nanoRP-HPLC-MS.
Purification and quality control of therapeutic peptides is often performed by one single method, RP-HPLC. As usage of an orthogonal technique is highly advisable for quality assurance, capillary electrophoresis (CE) employing a coated capillary coupled via a sheathless interface to a mass spectrometer was applied in parallel. The basic therapeutic peptide aviptadil served as a…Read More
Cardiotonic steroids are pure compounds that current many physiological and pharmacological capabilities. They bind Na+/Ok+-ATPase (NKA) modifying mobile ion focus and set off cell signaling mechanisms with out altering ion stability. These steroids are recognized to modulate some immune responses, together with cytokine manufacturing, neutrophil migration, and irritation (peripherally and within the nervous system). Irritation…Read More
High-Throughput Screening of a Promoter Library Reveals New Persister Mechanisms in Escherichia Coli
Persister cells are a small subpopulation of phenotypic variants that survive excessive concentrations of bactericidal antibiotics. Their survival mechanisms will not be heritable and will be fashioned stochastically or triggered by environmental stresses equivalent to antibiotic therapy. On this examine, high-throughput screening of an Escherichia coli promoter library and subsequent validation experiments recognized a number…Read More