Assertion: tonsil's cell | /r/AtLocation | unique pocket-like structure
Facets:
value: on their basolateral side
type: LOCATION
Source sentences:
text: Peyer's patches are covered by a special follicle-associated epithelium that contains specialized cells called microfold cells (M cells) which sample antigen directly from the lumen and deliver it to antigen-presenting cells (located in a unique pocket-like structure on their basolateral side).