Phenylalanine

amino-acid · integumentary · Oral

Phenylalanine, an amino acid. Hydroxylated by phenylalanine hydroxylase (PAH, bh4 cycle-dependent) to tyrosine — the catecholamine synthesis precursor. PAH deficiency…

Hydroxylated by phenylalanine hydroxylase (PAH, Tetrahydrobiopterin (BH4) cycle-dependent) to tyrosine — the Catecholamine synthesis precursor. PAH deficiency causes phenylketonuria (PKU). Precursor to adrenaline, Norepinephrine, Dopamine; also to melanin via tyrosinase.

Sources: PMID:10837313