FORMATION CONSTANT OF THE CALCIUM (ATP)2 COMPLEX

Abstract Although there is some indication that a complex [Ca(ARP)]2 6- exists,1,2 no definitive evidence for it has been produced nor has its formation constant been reported. We have investigated its formation by means of conductometric titration and a Ca-specific electrode. The formation constants for other calcium-ATP complexes. [Ca(ATP)]2- and [Ca2(ATP)]0 have been reported by several authors.3–5