Assertion: strawberry | /r/MadeOf | protein
Facets:
Source sentences:
text: Strawberries contain a protein that can cause symptoms in people who are sensitive to birch pollen or apples — a condition known as pollen-food allergy ( 66 , 67 , 68 ).
text: Strawberries containing this protein redden into the familiar appearance as they reach full ripeness signaling their readiness to be consumed.