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Phenylalanine ball and stick model spinning. Phenylalanine (symbol Phe or F) [3] is an essential α-amino acid with the formula C 9 H 11 NO 2.It can be viewed as a benzyl group substituted for the methyl group of alanine, or a phenyl group in place of a terminal hydrogen of alanine.
Toxic levels of phenylalanine, along with insufficient levels of tyrosine, can interfere with infant development in ways that have permanent effects. The disease may present clinically with seizures , hypopigmentation (excessively fair hair and skin), and a "musty odor" to the baby's sweat and urine (due to phenylacetate , a carboxylic acid ...
This metabolic pathway is nonexistent in the healthy body, but becomes important after peripheral l-DOPA administration in patients with Parkinson's disease or in the rare cases of patients with AADC enzyme deficiency. [11] l-Phenylalanine, l-tyrosine, and l-DOPA are all precursors to the biological pigment melanin.
Aspartame is an artificial non-saccharide sweetener commonly used as a sugar substitute in foods and beverages. [4] 200 times sweeter than sucrose, it is a methyl ester of the aspartic acid/phenylalanine dipeptide with brand names NutraSweet, Equal, and Canderel. [4]
Selectional pleiotropy occurs when the resulting phenotype has many effects on fitness (depending on factors such as age and sex). [1] An example of pleiotropy is phenylketonuria, an inherited disorder that affects the level of phenylalanine, an amino acid that can be obtained from food, in the human body. Phenylketonuria causes this amino acid ...
In mammals it is created from -lactate and L-phenylalanine by the cytosol nonspecific dipeptidase (CNDP2) protein. [1] It is classified as N-acyl-alpha-amino acid and pseudodipeptide. [11] It has also been reported that as an additive, N-L-lactoyl phenylalanine improves the taste of food, conferring an umami flavor. [12]
Because of the pharmacological relationship between phenethylamine and amphetamine, the original paper and both reviews suggest that phenethylamine plays a prominent role in mediating the mood-enhancing euphoric effects of a runner's high, as both phenethylamine and amphetamine are potent euphoriants. [3] [27] [28]
D-Phenylalanine (DPA, D-Phe), sold under the brand names Deprenon, Sabiben, and Sabiden, is an enantiomer of phenylalanine which is described as an antidepressant and is marketed as a prescription drug for medical use in Argentina. [1] [2] The medication has been marketed since at least the 1970s [3] and continued to be available by the 2000s. [1]
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