Assertion: breast cancer's mutation | /r/HasProperty | change
Facets:
value: in one
type: OTHER
Source sentences:
text: But only a small percentage of people with breast cancer are born with a mutation, a change in DNA, in BRCA1 or BRCA2.
text: These mutations can be changes in one or a small number of DNA base pairs (the building-blocks of DNA), and can be identified with PCR and DNA sequencing.[citation needed]