Assertion: cell membrane | /r/MadeOf | many receptors
Facets:
Source sentences:
text: Receptor-mediated endocytosis is endocytosis by a portion of the cell membrane that contains many receptors that are specific for a certain substance.
text: Receptor-mediated endocytosis is endocytosis by a portion of the cell membrane which contains many receptors that are specific for a certain substance.