fˈæmɪli ɐ həmˈɑːləɡəs ɹˈiːdʒənz vˈɛɹi ɪn sˈaɪz bᵻtwˌiːn θˈɜːɾi θɹˈiːhˈʌndɹɪd bˌiːpˈiː ænd ɑːɹ fˈaʊnd ɪn ɐ wˈʌnhˈʌndɹɪd fˈoːɹ kˌeɪbˌiːpˈiː tˈuːhˈʌndɹɪd θɹˈiːhˈʌndɹɪd fˈoːɹ kˌeɪbˌiːpˈiː sˈɛkʃən ʌvðə dʒˈiːnoʊm, ðæt kəntˈeɪnz nˈoʊ dʒˈiːn hˈɑːməlˌɑːɡz ʌv nˈoʊn fˈʌŋkʃən ɪnðə kˈɜːɹənt dˈeɪɾə bˈeɪsᵻz.
Family A homologous regions vary in size between 30–300 bp and are found in a 104 kbp (200–304 kbp) section of the genome, that contains no gene homologs of known function in the current data bases.