Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Results 1 - 10 of 30 for CAFFEINE OR NICOTINE OR PHENYLALANINE OR TRYPTOPHAN OR TYROSINE
  1. Tyrosine hydroxylase deficiency 
    Tyrosine hydroxylase (TH) deficiency is a disorder that primarily affects movement. There are three forms of tyrosine hydroxylase deficiency, and they are categorized ...
    https://medlineplus.gov/.../tyrosine-hydroxylase-deficiency - Genetics
  2. Phenylketonuria 
    ... that increases the levels of a substance called phenylalanine in the blood. Phenylalanine is a protein building block (an amino acid) ... some artificial sweeteners. If PKU is not treated, phenylalanine can build up to harmful levels in the ...
    https://medlineplus.gov/genetics/condition/phenylketonuria - Genetics
  3. Tyrosinemia 
    ... characterized by problems breaking down the amino acid tyrosine, which is a building block of most proteins. If the condition is untreated, tyrosine and its byproducts build up in tissues and ...
    https://medlineplus.gov/genetics/condition/tyrosinemia - Genetics
  4. Sepiapterin reductase deficiency 
    Sepiapterin reductase deficiency is a condition characterized by movement problems, most often a pattern of involuntary, sustained muscle contractions known as dystonia. ...
    https://medlineplus.gov/.../sepiapterin-reductase-deficiency - Genetics
  5. Tetrahydrobiopterin deficiency 
    ... levels of several substances in the body, including phenylalanine. Phenylalanine is a building block of proteins (an amino ... and in some artificial sweeteners. High levels of phenylalanine are present from early infancy in people with ...
    https://medlineplus.gov/.../condition/tetrahydrobiopterin-deficiency - Genetics
  6. Dopa-responsive dystonia 
    ... TH gene provides instructions for making the enzyme tyrosine hydroxylase, which helps convert the amino acid tyrosine to dopamine.Mutations in the GCH1 or SPR ...
    https://medlineplus.gov/genetics/condition/dopa-responsive-dystonia - Genetics
  7. Glutaric acidemia type I 
    ... break down the amino acids lysine, hydroxylysine, and tryptophan, which are building blocks of protein. Excessive levels ... in processing the amino acids lysine, hydroxylysine, and tryptophan.Mutations in the GCDH gene prevent production of ...
    https://medlineplus.gov/genetics/condition/glutaric-acidemia-type-i - Genetics
  8. Alkaptonuria 
    ... This enzyme helps break down the amino acids phenylalanine and tyrosine, which are important building blocks of proteins. Mutations ... substance called homogentisic acid, which is produced as phenylalanine and tyrosine are broken down, accumulates in the ...
    https://medlineplus.gov/genetics/condition/alkaptonuria - Genetics
  9. Neuroblastoma 
    ... instructions for making a protein called ALK receptor tyrosine kinase. Although the specific function of this protein ... result in an abnormal version of ALK receptor tyrosine kinase that is constantly turned on (constitutively activated). ...
    https://medlineplus.gov/genetics/condition/neuroblastoma - Genetics
  10. Multiple cutaneous and mucosal venous malformations 
    ... instructions for making a protein called TEK receptor tyrosine kinase. This receptor protein triggers chemical signals needed ... analysis of a mutant form of the receptor tyrosine kinase Tie2 causing venous malformations. J Mol Med ( ...
    https://medlineplus.gov/...utaneous-and-mucosal-venous-malformations - Genetics
previous · 1 · 2 · 3 · next