EOG8THZ7R	GO:0005815	10/13	microtubule organizing center	cellular_component	"An intracellular structure that can catalyze gamma-tubulin-dependent microtubule nucleation and that can anchor microtubules by interacting with their minus ends, plus ends or sides." [GOC:vw, http://en.wikipedia.org/wiki/Microtubule_organizing_center, ISBN:0815316194, PMID:17072892, PMID:17245416]
EOG8THZ7R	GO:0007020	10/13	microtubule nucleation	biological_process	"The process in which tubulin alpha-beta heterodimers begin aggregation to form an oligomeric tubulin structure (a microtubule seed). Microtubule nucleation is the initiating step in the formation of a microtubule in the absence of any existing microtubules ('de novo' microtubule formation)." [GOC:go_curators, ISBN:0815316194, PMID:12517712]
EOG8THZ7R	GO:0000922	10/13	spindle pole	cellular_component	"Either of the ends of a spindle, where spindle microtubules are organized; usually contains a microtubule organizing center and accessory molecules, spindle microtubules and astral microtubules." [GOC:clt]