question: Is a protein causes an allergic reaction, what is it called?
choices.text: keratin allergen enzymes prion amebiasis Type O immunocompromised antigen
choices.label: A B C D E F G H
fact2: Antigens are proteins foreign to the body.
combinedfact: Any foreign protein that causes an allergic reaction is called an allergen.
formatted_question: Is a protein causes an allergic reaction, what is it called? (A) keratin (B) allergen (C) enzymes (D) prion (E) amebiasis (F) Type O (G) immunocompromised (H) antigen