Assertion: cell wall's protein | /r/CapableOf | bind oxygen
Facets:
Source sentences:
text: Red blood cells, which transport oxygen from the lungs to all of the body’s tissues, contain hemoglobin, an iron-rich protein that binds oxygen.
text: It is covered with a membrane composed of lipids and proteins, lacks a nucleus, and contains hemoglobin—a red iron-rich protein that binds oxygen.