axon microtubule bundle
http://purl.obolibrary.org/obo/GO_1901589
An arrangement of closely apposed microtubules running parallel to each other in the axon hillock and initial segment. [ GOC:TermGenie http://www.neurolex.org/wiki/sao707332678 ]
Synonyms: axon microtubule fascicle, microtubule bundle of axon, microtubule fascicle of axon