Dopa and 5-S-cysteinyldopa in the serum of albino, black, and red guinea pigs

Acta Derm Venereol. 1980;60(2):155-56.


Dopa and 5-S-cysteinyldopa levels in serum of albino, red, and black guinea-pigs were quantified. The levels of both amino acids were lower in the albino than in the pigmented animals. It is suggested that the serum levels of dopa and 5-S-cysteinyldopa in pigmented animals reflect tyrosine and dopa oxidation activity in the melanocytes.

MeSH terms

  • Animals
  • Cysteinyldopa / analysis
  • Cysteinyldopa / blood
  • Dihydroxyphenylalanine / analysis
  • Dihydroxyphenylalanine / blood*
  • Guinea Pigs
  • Skin / analysis
  • Skin Pigmentation*
  • Species Specificity


  • Cysteinyldopa
  • Dihydroxyphenylalanine