kˈɜːɹənt nˈɑːlɪdʒ ˈɪndᵻkˌeɪts mˈaɪɾəsˌoʊmz pɹˈɑːbəbli plˈeɪ ɐ ɹˈoʊl ɪn fˈiːˈɛs klˈʌstɚɹ ɐsˈɛmbli, sˈɪns ðeɪ duːnˌɑːt dɪsplˈeɪ ˌɛni ʌvðə pɹˈoʊtiːnz ɪnvˈɑːlvd ɪn ˈʌðɚ mˈeɪdʒɚ mˌaɪɾəkˈɑːndɹɪəl fˈʌŋkʃənz ɛɹˈoʊbɪk ɹˌɛspᵻɹˈeɪʃən vˈaɪəɹ ˈɑːksɪdətˌɪv fˌɑːsfoːɹɪlˈeɪʃən, hˈiːm bˌaɪoʊsˈɪnθəsˌɪs wˌaɪl ðeɪ dˈuː dɪsplˈeɪ pɹˈoʊtiːnz ɹᵻkwˈaɪɚd fɔːɹ fˈiːˈɛs klˈʌstɚ bˌaɪoʊsˈɪnθəsˌɪs lˈaɪk fɹˈæɾɐksˌɪn, sˈɪstaɪn diːsˈʌlfjʊɹɹˌeɪz, ˈɪsuː wˈʌn ænd ɐ mˌaɪɾəkˈɑːndɹɪəl ˌeɪtʃˌɛspˈiː sˈɛvənti.
Current knowledge indicates mitosomes probably play a role in Fe-S cluster assembly, since they do not display any of the proteins involved in other major mitochondrial functions (aerobic respiration via oxidative phosphorylation, haem biosynthesis) while they do display proteins required for Fe-S cluster biosynthesis (like frataxin, cysteine desulfurase, Isu1 and a mitochondrial Hsp70).