D-myo-Inositol-1,2,4,5-tetraphosphate (Ins(1,2,4,5)P4) is one of the many inositol phosphate (InsP) isomers that act as small, soluble second messengers in the transmission of cellular signals. Ins(1,2,4,5)P4 exhibits agonist activity at the Ins(1,4,5)P3 receptor expressed in CHO cells where it...