fˌɜːðɚmˈoːɹ, ɪn zˈɛbɹæfɪʃ, nˈoʊdəl sˈɪɡnəlɪŋ ɪz ɹᵻkwˈaɪɚd fɔːɹ dˌɪfɚɹˌɛnʃɪˈeɪʃən ʌv mˈiːdiːəl flˈoːɹ plˈeɪt sˈɛlz wˈɛɹæz ˌɛsˌeɪtʃˈeɪtʃ ɪz ɛkspˈɛndəbəl.
Furthermore, in zebrafish, Nodal signaling is required for differentiation of medial floor plate cells whereas Shh is expendable.