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  2. 6-Pyruvoyltetrahydropterin synthase deficiency - Wikipedia

    en.wikipedia.org/wiki/6-Pyruvoyltetrahydropterin...

    It is a recessive disorder that is accompanied by hyperphenylalaninemia. Commonly reported symptoms are initial truncal hypotonia, subsequent appendicular hypertonia, bradykinesia, cogwheel rigidity, generalized dystonia, and marked diurnal fluctuation.

  3. Tetrahydrobiopterin deficiency - Wikipedia

    en.wikipedia.org/wiki/Tetrahydrobiopterin_deficiency

    Tetrahydrobiopterin deficiency (THBD, BH 4 D) is a rare metabolic disorder that increases the blood levels of phenylalanine.Phenylalanine is an amino acid obtained normally through the diet, but can be harmful if excess levels build up, causing intellectual disability and other serious health problems.

  4. Hawkinsinuria - Wikipedia

    en.wikipedia.org/wiki/Hawkinsinuria

    Hawkinsinuria is an autosomal dominant metabolic disorder affecting the metabolism of tyrosine. [1] [2] Normally, the breakdown of the amino acid tyrosine involves the conversion of 4-hydroxyphenylpyruvate to homogentisate by 4-hydroxyphenylpyruvate dioxygenase. Complete deficiency of this enzyme would lead to tyrosinemia III. In rare cases ...

  5. 15 Most Common Puppy Health Issues and How to Spot Them - AOL

    www.aol.com/15-most-common-puppy-health...

    Related: Kennel Cough Symptoms and Ways to Help Your Dog Stay Comfortable. Joint Abnormalities. Patellar luxations, or knees that slip out of place when touched, are usually identified during the ...

  6. Aromatic amino acid - Wikipedia

    en.wikipedia.org/wiki/Aromatic_amino_acid

    Tyrosine is semi-essential; therefore, it can be synthesized by the animal, but only from phenylalanine. Phenylketonuria, a genetic disorder that occurs as a result of the inability to breakdown phenylalanine, is due to a lack of the enzyme phenylalanine hydroxylase. A dietary lack of tryptophan can cause stunted skeletal development. [9]

  7. Tetrahydrobiopterin - Wikipedia

    en.wikipedia.org/wiki/Tetrahydrobiopterin

    Tetrahydrobiopterin (BH 4, THB), also known as sapropterin (INN), [5] [6] is a cofactor of the three aromatic amino acid hydroxylase enzymes, [7] used in the degradation of amino acid phenylalanine and in the biosynthesis of the neurotransmitters serotonin (5-hydroxytryptamine, 5-HT), melatonin, dopamine, norepinephrine (noradrenaline), epinephrine (adrenaline), and is a cofactor for the ...

  8. Skin conditions in dogs: Symptoms, causes, and how to help - AOL

    www.aol.com/skin-conditions-dogs-symptoms-causes...

    Skin conditions in dogs are very common, so it's important to recognize the symptoms and understand the factors that cause them. Dr. Rebecca MacMillan, a vet with over 15 years of experience, says ...

  9. Hyperphenylalaninemia - Wikipedia

    en.wikipedia.org/wiki/Hyperphenylalaninemia

    Phenylketonuria (PKU)-like symptoms, including more pronounced developmental defects, skin irritation, and vomiting, may appear when phenylalanine levels are near 20 mg/dL (1200 mol/L). [1] Hyperphenylalaninemia is a recessive hereditary metabolic disorder that is caused by the body's failure to convert phenylalanine to tyrosine as a result of ...