Assertion: brown algae's acid | /r/HasProperty | m units
Facets:
Source sentences:
text: They belong to a family of linear block polyanionic copolymers composed of (1-4)-linked-d-mannuronic acid (M units) and (1–4)-linked-l-guluronic acid (G units) residues (Zhang et al., 2009; Mitrano et al., 2010).