KROK 1 Stomatology 2014 – Question 117 · KROK (Dentistry)

A 34-year-old patient has a history of periodontitis. As a result of increased collagen degradation, there is a significantly increased urinary excretion of one of the amino acids. Which one?

  1. A. Hydroxyproline
  2. B. Serine
  3. C. Alanine
  4. D. Valine
  5. E. Glycine
Hint

Look for the amino acid that is formed by post-translational modification and occurs almost exclusively in collagen, making it a marker of collagen breakdown.

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