Structure and/or Key Feature(s)
A zone of dense centrosomal matrix or pericentriolar matrix contains numerous proteins that initiate the growth of a microtubule (Ross and Pawlina, 2006).
Related parts of the anatomy
Function
Microtubule formation begins within the pericentriolar matrix (Ross and Pawlina, 2006).
References
Ross, M. H. and Pawlina, W. (2006) Histology: A text and atlas. Lippincott Williams & Wilkins.