tˌiːˌɑːɹkˈeɪ ˈeɪ. ˈæmɪtɹˌɪptɪlˌaɪn ˈæktᵻvˌeɪts tˌiːˌɑːɹkˈeɪ ɐ ænd fəsˈɪlᵻtˌeɪts ðə hˌɛɾɚɹˌoʊdɪmɚɹaɪzˈeɪʃən ʌv tˌiːˌɑːɹkˈeɪ ɐ ænd tˌiːˌɑːɹkˈeɪ bˈiː ɪnðɪ ˈæbsəns ʌv ˌɛndʒˌiːˈɛf.
TrkA. Amitriptyline activates TrkA and facilitates the heterodimerization of TrkA and TrkB in the absence of NGF.