The analysis of a protein three-dimensional structure consists in dividing the macromolecule into subunits called domains.
ðɪ ɐnˈæləsˌɪs əvə pɹˈoʊtiːn θɹˈiːdᵻmˈɛnʃənəl stɹˈʌktʃɚ kənsˈɪsts ɪn dᵻvˈaɪdɪŋ ðə mˈækɹəmˌɑːlɪkjˌuːl ˌɪntʊ sˈʌbjuːnˌɪts kˈɔːld dəmˈeɪnz.