aubf leccc Flashcards
Test for alkaptonuria
Benedict Test, Ferric Chloride Test
DEFECTIVE ENZYME of alkaptonuria
Homogentisic acid oxidase
A deficiency of homogentisic acid
oxidase leads to the accumulation of
homogentisic acid in tissues and urine.
Causes ochronosis (pigmentation of
connective tissues) and arthritis over
time.
alkaptonuria
Darkening of urine upon exposure to air due to oxidation of homogentisic acid.
alkaptonuria
test for maple syrup urine disease
Hoesch test
defective enzyme of maple syrup urine disease
Branched-chain alpha-keto acid dehydrogenase complex
Deficiency in the enzyme complex that
breaks down branched-chain amino acids
(leucine, isoleucine, valine). Leads to
the accumulation of these amino acids,
resulting in toxic effects on the brain.
Maple Syrup Urine Disease
Sweet, maple syrup odor in urine. Elevated levels of leucine, isoleucine, and valine.
Maple Syrup Urine Disease
test for melanuria
Nitrosonaphthol Test
Increased production or excretion of
melanin or its precursors, is often associated with malignant melanoma.
Melanuria
Dark pigmentation in urine upon standing due to melanin or its precursors.
melanuria
test for phenylketonuria
Silver nitrate test
defective enzyme for phenylketonuria
Phenylalanine hydroxylase
Deficiency in phenylalanine hydroxylase,
which converts phenylalanine to tyrosine,
leads to toxic levels of phenylalanine in the blood and urine.
phenylketonuria (PKU)
The musty odor of urine, elevated phenylalanine in blood and urine
Phenylketonuria