Search results
Results from the WOW.Com Content Network
Theoretical calculations have been used to show that zwitterions may also be present in the gas phase for some cases different from the simple carboxylic acid-to-amine transfer. [6] The pK a values for deprotonation of the common amino acids span the approximate range 2.15 ± 0.2. This is also consistent with the zwitterion being the ...
Amino acids have zero mobility in electrophoresis at their isoelectric point, although this behaviour is more usually exploited for peptides and proteins than single amino acids. Zwitterions have minimum solubility at their isoelectric point, and some amino acids (in particular, with nonpolar side chains) can be isolated by precipitation from ...
D-Amino acids are used in racemic crystallography to create centrosymmetric crystals, which, depending on the protein, may allow for easier and more robust protein structure determination. [9] Gramicidin is a polypeptide made up from mixture of D- and L-amino acids. [10] Other compounds containing D-amino acids are tyrocidine and valinomycin.
Present in the samples were 14 of the 20 organic compounds called amino acids that are used to make proteins - complex molecules that play indispensable roles in the structure, function and ...
Amino acid biosynthesis is the set of biochemical processes (metabolic pathways) by which the amino acids are produced. The substrates for these processes are various compounds in the organism's diet or growth media. Not all organisms are able to synthesize all amino acids. For example, humans can synthesize 11 of the 20 standard amino acids ...
Protein anabolism is the process by which proteins are formed from amino acids. It relies on five processes: amino acid synthesis, transcription, translation, post translational modifications, and protein folding.
The L-form is found in nature. Glutamine contains an α-amino group which is in the protonated −NH 3 + form under biological conditions and a carboxylic acid group which is in the deprotonated −COO − form, known as carboxylate, under physiological conditions. Glutamine zwitterionic forms at neutral pH: L-glutamine (left) and D-glutamine
Depression is primarily a human condition described by the World Health Organization as a low mood or loss of pleasure or interest in activities for long periods of time. In people, it results ...