ðə kˈælsiəm bˈaɪndz tə ðə kˌɑːɹbəksˈɪlɪk ɡɹˈuːps ʌv θɹˈiː ɐspˈɑːɹɾeɪt ɹˈɛsɪdˌuːz ˈæsp ˈeɪɾi tˈuː, ˈeɪɾi sˈɛvən, ˈeɪɾi ˈeɪt, sˈiːn ɪn blˈuː ænd tə ðə kˈɑːɹbənˌaɪl ɡɹˈuːps fɹʌm lˈaɪsaɪn sˈɛvənti nˈaɪn ænd ɐspˈɑːɹɾeɪt ˈeɪɾi fˈoːɹ, sˈiːn ɪn pˈɜːpəl.
The calcium binds to the carboxylic groups of three aspartate residues (Asp 82, 87, 88), seen in blue and to the carbonyl groups from lysine 79 and aspartate 84, seen in purple.