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Red algae (Rhodophyta) are primarily found in marine habitats around the world and they have been a prolific source of structurally diverse natural products. Among them the genus Bostrychia (Ceramiales, Rhodomelaceae) consists of approximately 40 taxonomically accepted species, and some, e. g., B. tenella, B. radicans, B. moritziana, B. simpliciuscula and B. intricate, include cryptic species. DNA sequence data show three genetic lineages within Bostrychia calliptera, another polyphyletic species requiring further taxonomic investigation. In an attempt to examine whether there are differences in the metabolite pattern that support the re-circumscription of the species and to uncover biogeographic patterns, phytochemical profiling of those samples used for DNA sequencing was conducted. This investigation revealed clearly three different chemotypes, corresponding to the lineages of the published molecular analysis results. The first lineage had a distinct and recognizably different phytochemical profile in contrast to the second and the third lineage which shared some similarities. Still, variations in the pattern of their phenolic compounds allowed a clear discrimination between the second and third lineage, too. The most important marker substances were isolated and their structures elucidated resulting in the characterization of four undescribed phenols. The isolated substances from B. calliptera are considered as suitable chemotaxonomic markers within this polyphyletic group.
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Natural nonproteinogenic amino acids vastly outnumber the well-known 22 proteinogenic amino acids. Such amino acids are generated in specialized metabolic pathways. In these pathways, diverse biosynth...
This study investigated the effects of different amino acids on the fermentation of pure inulin and glucose by using Paenibacillus polymyxa ZJ-9 in order to improve the production of R,R-2,3-butanedio...
α,α'-Disubstituted amino acids serve as important non-proteinogenic amino acids in the construction of stabilised helical peptides. To expand the repertoire of α,α'-disubstituted amino acids, chir...
Finding and feeding on appropriate food are crucial for all animals. Carbohydrates and amino acids are both essential nutrients, albeit with distinct roles: the former are the main energy source where...
The intake of specific amino acids (AA) has been associated with cardiovascular health, but amino acids are consumed together as dietary protein. Here we investigated the association between identifie...
This protocol seeks to define aspects of intestinal and hepatic uptake and metabolism of several amino acids. The major hypothesis to be tested is that the splanchic bed (intestine and li...
To analyze the relationship of dietary variables to urinary excretion of amino acids and the relationships of specific urinary amino acids to blood pressure.
The goal of this study is to determine if an oral provision of amino acids will enhance exercise-induced increases in markers of Achilles tendon collagen production.
Zinc may be absorbed from diet via zinc transporter mediated pathways, or, when coupled with amino acids, via amino acid transporter pathways. When zinc is coupled with amino acids in diet...
The purpose of this study is to determine whether Branched chain Amino Acids enhances the uptake of ammonia in muscle tissue.
Amino acids and chains of amino acids connected by peptide linkages.
Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are linear polypeptides that are normally synthesized on RIBOSOMES.
Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins.
Tungsten hydroxide oxide phosphate. A white or slightly yellowish-green, slightly efflorescent crystal or crystalline powder. It is used as a reagent for alkaloids and many other nitrogen bases, for phenols, albumin, peptone, amino acids, uric acid, urea, blood, and carbohydrates. (From Merck Index, 11th ed)
A group of inherited kidney disorders characterized by the abnormally elevated levels of AMINO ACIDS in URINE. Genetic mutations of transport proteins result in the defective reabsorption of free amino acids at the PROXIMAL RENAL TUBULES. Renal aminoaciduria are classified by the specific amino acid or acids involved.
Bioinformatics is the application of computer software and hardware to the management of biological data to create useful information. Computers are used to gather, store, analyze and integrate biological and genetic information which can then be applied...
DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. During DNA sequencing, the bases of a small fragment of DNA are sequentially identified from signals emitted as each fragment is re-synthesized from a ...