Assertion: alkaptonuria's effect | /r/CapableOf | appear after 30 years of age
Facets:
value: typically
type: DEGREE
Source sentences:
text: As a result of these mutations, those with AKU experience a buildup of homogentisic acid (HGA) in the body, which causes black pigment to deposit into connective tissue and darken skin and cartilage, a side effect called ochronosis that typically appears after 30 years of age.