Mobli and colleagues, published in the "Angewandte Chemie International Edition," which determined the acidity of the two selenols in the reduced form of the hormone vasopressin through seleno nuclear magnetic resonance spectroscopy.EBSCO_AspChemistry in Australia...
Amino Acids: Chemistry and Classification P.W. Emery, in Encyclopedia of Human Nutrition (Third Edition), 2013 Abstract Amino acids are the monomers from which proteins are made. All amino acids contain a primary amine group and a carboxylic acid group, together with other groups that determine...
Amino acid - Reactions, Structure, Synthesis: Amino acids via their various chemical functionalities (carboxyls, amino, and R groups) can undergo numerous chemical reactions. However, two reactions (peptide bond and cysteine oxidation) are of particular
Amino acid - Building Blocks, Structure, Functions: One of the most useful manners by which to classify the standard (or common) amino acids is based on the polarity (that is, the distribution of electric charge) of the R group (e.g., side chain). Grou
Basic Chemistry Chemical StructureNo structure CommentsA 92 amino acid alpha chain plus a 111 amino acid beta chain (Protein Data Bank-1FL7). Unique beta chains confer biological activity, whereas the alpha chain is the same as for LH, hCG (human chorionic gonadotropin), and TSH. Chains are...
Zwitterionsform from amino acids when the hydrogen from the carboxylic acid group (-COOH) dissociates from the molecule and forms adative covalent bondwith the nitrogen in the amine group (-NH2). This forms an ion with two charges: RCH(NH3+)COO-. ...
FormulaResidue Weight (-H2O)pKapKbpKxpl AlanineAlaA89.10C3H7NO2C3H5NO71.082.349.69–6.00 ArginineArgR174.20C6H14N4O2C6H12N4O156.192.179.0412.4810.76 AsparagineAsnN132.12C4H8N2O3C4H6N2O2114.112.028.80–5.41 Aspartic acidAspD133.11C4H7NO4C4H5NO3115.091.889.603.652.77 ...
Interestingly, when comparing the molecular formulae of all four ribose amino acid model systems, there was no single molecular formula that was common to all four samples among the > 1000 MRPs identified. This demonstrates how difficult it is to find general Maillard reaction markers, which ...
Amino Acids, Peptides and Proteins in Organic Chemistry (Wiley, 2009). Cabrele, C., Martinek, T. A., Reiser, O. & Berlicki, L. Peptides containing β‑amino acid patterns: challenges and successes in medicinal chemistry. J. Med. Chem. 57, 9718–9739 (2014). Article CAS PubMed ...
Vinblastin-23-oyl Amino-acid Derivatives - Chemistry, Physicochemical Data, Toxicity, and Antitumor Activities Against P388 and L1210 Leukemias The dimeric alkaloids vinblastine (VLB) and vincristine (VCR) differ structurally only in the functional group on the dihydroindole nitrogen. The semisynth....