tˌiːˌɑːɹkˈeɪ bˈiː ɪz pˈɑːɹt əvə sˈʌbfˈæmɪli ʌv pɹˈoʊtiːn kˈɪneɪsᵻz wˌɪtʃ ɪŋklˈuːdz ˈɔːlsoʊ tˌiːˌɑːɹkˈeɪ ɐ ænd tˌiːˌɑːɹkˈeɪ sˈiː.  ðɛɹˌɑːɹ ˈʌðɚ nˌʊɹɹətɹˈoʊfɪk fˈæktɚz stɹˈʌktʃɚɹəli ɹᵻlˈeɪɾᵻd tə bˌiːdˌiːˌɛnˈɛf:
TrkB is part of a sub-family of protein kinases which includes also TrkA and TrkC.  There are other neurotrophic factors structurally related to BDNF: