Two novel amino acids containing a γ-lactone ring, domoilactone A and B were isolated from the red alga, Chondria armata, and their structures were proposed on the basis of spectroscopic evidence.MitsuruMaedaandTohruKodamaandTakaharuTanaka
Structures of the 20 essential amino acids. They are grouped into nonpolar, polar, positively charged, and negatively charged. Two codes are in use: one with only a single letter (such as G, A, …), the other with three-letter combinations (such as Gly, Ala, …). The residue masses ...
The name “amino acid” is derived from the fact that they contain both amino group and carboxyl-acid-group in their basic structure. As mentioned, there are 20 amino acids present in proteins. Nine of these are considered essential amino acids in humans because the human body cannot produce ...
During preparative hydrolysis both asparagine and glutamine undergo rapid irreversible deamination to aspartic acid and glutamic acid respectively54. It is therefore not possible to distinguish between the acidic amino acids and their derivatives and they are reported together as Asx and Glx respectively....
Metal-catalysed reactions involving ammonia gas are plagued by ammonia’s strong Lewis basicity, which leads to poor chemoselectivity and enantioselectivity. Here we introduce a strategy for preparing chiral α-amino acids directly from ammonia. By the c
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Amino acids serve as the foundational elements of proteins, vital to the optimal functioning of biological structures. Proteins in all life forms are composed of 20 coreamino acids. However, nature offers an impressive variety of over 500 distinct amino acids. Additionally, a plethora of synthetic...
Explore the guide to amino acids: structures, functions, health benefits, and roles in biochemistry. Ideal for students, researchers, and biochemistry enthusiasts.
Molecular Recognition and Chirality in Amphiphilic Assemblies Amino acids are a particular case in point as they can exist in a variety of chemical forms depending on their environment, ranging from zwitterionic, NH3+RCOO−, (the usual solid state form), anionic, NH2RCOO−, cationic, NH3+RC...
(serine, threonine), sulfur-containing amino acids (cysteine, methionine), aromatic amino acids (phenylalanine, tyrosine), heterocyclic amino acids (tryptophan, histidine), basic amino acids (lysine, arginine), acidic amino acids and their amides (aspartate, glutamate, asparagine, glutamine), and ...