Assertion: gene's mutation | /r/Causes | symptom
Facets:
value: in the presence of environmental toxins
type: OTHER
Source sentences:
text: Mutations that prevent the production of any functional receptor protein cause more severe signs and symptoms of Leydig cell hypoplasia.
text: B. It usually cannot be determined whether a certain mutation will cause severe or mild MPS VI; however, mutations known to result in the complete absence of arylsulfatase B activity cause severe signs and symptoms.
text: These mutations may not necessarily manifest as disease and may only cause symptoms in the presence of environmental toxins.