Assertion: centrosome's centriole | /r/LocatedNear | a mass of protein
Facets:
Source sentences:
text: The centrosome is a microtubule organizing center, or MTOC, comprised of two centrioles surrounded by a mass of protein called pericentriolar material, or PCM.
text: The centrosome is an organelle that consists of two centrioles surrounded by a mass of proteins.