ðə ɹˈiːdʒən ɪf ᵻlˈɛktɹɑːn dˈɛnsᵻɾi æt wˌɪtʃ ðə sˈɛntɹəl mˌaɪkɹoʊtˈuːbjuːl pˈɛɹ ɑːɹ nˈuːklɪˌeɪɾᵻd ɪnðə jˌuːkɐɹɪˈɑːɾɪk flɐdʒˈɛləm ˈæksoʊnˌiːm
The region if electron density at which the central microtubule pair are nucleated in the eukaryotic flagellum axoneme