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Alanine is the simplest α-amino acid after glycine. The methyl side-chain of alanine is non-reactive and is therefore hardly ever directly involved in protein function. [12] Alanine is a nonessential amino acid, meaning it can be manufactured by the human body, and does not need to be obtained through the diet. Alanine is found in a wide ...
These six are alanine, aspartic acid, asparagine, glutamic acid, serine, [2] and selenocysteine (considered the 21st amino acid). Pyrrolysine (considered the 22nd amino acid), [ 3 ] which is proteinogenic only in certain microorganisms, is not used by and therefore non-essential for most organisms, including humans.
For example, the systematic name of alanine is 2-aminopropanoic acid, based on the formula CH 3 −CH(NH 2)−COOH. The Commission justified this approach as follows: [7] The systematic names and formulas given refer to hypothetical forms in which amino groups are unprotonated and carboxyl groups are undissociated.
As an example, consider alanine. Alanine is a glucogenic amino acid that the liver's gluconeogenesis process can use to produce glucose. Muscle cells break down their protein when their blood glucose levels fall, which happens during fasting or periods of intense exercise. The breakdown process releases alanine, which is then transferred to the ...
Alanine and Cori cycles. The Cahill cycle, also known as the alanine cycle or glucose-alanine cycle, [1] is the series of reactions in which amino groups and carbons from muscle are transported to the liver. [2] It is quite similar to the Cori cycle in the cycling of nutrients between skeletal muscle and the liver. [1]
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Aspartate is converted to β-alanine. The amino group of valine is replaced by a keto-moiety to yield α-ketoisovalerate, which, in turn, forms α-ketopantoate following transfer of a methyl group, then D-pantoate (also known as pantoic acid) following reduction. β-alanine and pantoic acid are then condensed to form pantothenic acid (see figure).
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