Altogether, over 200 toxins have been isolated from the limited number of amphibian species that have been investigated.
ˌɔːltəɡˈɛðɚ, ˌoʊvɚ tˈuːhˈʌndɹɪd tˈɑːksɪnz hɐvbɪn ˈaɪsəlˌeɪɾᵻd fɹʌmðə lˈɪmɪɾᵻd nˈʌmbɚɹ ʌv æmfˈɪbiən spˈiːsiːz ðæt hɐvbɪn ɪnvˈɛstᵻɡˌeɪɾᵻd.