phenylalanine

Protein building block

Phenylalanine is an amino acid essential to human nutrition, obtained through diet since the body cannot synthesize it.

It appears on food labels because people with phenylketonuria (PKU) cannot metabolize it safely: Contains phenylalanine.

The artificial sweetener aspartame breaks down into phenylalanine, requiring such warnings on diet sodas and sugar-free products.

metabolism

tyrosine

Protein-building amino acid

tetrahydrobiopterin · deamination · melanin · dopamine · norepinephrine · epinephrine · neurotransmitter

nutrition

protein

Folded amino chain

NutraSweet · supplement · meat · fish · eggs · dairy · soy · tofu · legumes · nuts

biosynthesis

plastid

Plant cell organelle

  • plantsPhotosynthesizing rooted organisms
  • bacteriaNucleus-free single-celled organisms
  • fungiSpore-reproducing decomposers

precursor · tryptophan · tyrosine · enzyme · synthesis

genetics

carrier

One that transports

heterozygote · phenotype

structure

aromatic

Pleasantly strong-smelling

aromaticity · residue · carboxyl · amine · nonpolar

Categories
Opposites
essential vs. non-essential amino acids

phenylalaninealanine

Basic amino acid

glutamate · aspartate · glycine · asparagine · serine

PKU-restricted vs. PKU-safe substances

phenylalaninefruits

Edible seed-bearing crops

vegetables

Family

phenyl

Familiarity
Top 1,000,000
Profile
Used worldwide · Timeless · Concrete · Rated G