ðˈʌs, tˌiːˌɑːɹkˈeɪ ɪz ðə mˈiːdɪˌeɪɾɚɹ ʌv dɪvˈɛləpmˈɛntəl ænd ɡɹˈoʊθ pɹˈɑːsɛsᵻz ʌv ˌɛndʒˌiːˈɛf, ænd plˈeɪz ɐ kɹˈɪɾɪkəl ɹˈoʊl ɪnðə dɪvˈɛləpmənt ʌvðə nˈɜːvəs sˈɪstəm ɪn mˈɛni ˈɔːɹɡənˌɪzəmz.
Thus, Trk is the mediator of developmental and growth processes of NGF, and plays a critical role in the development of the nervous system in many organisms.