Ins（1,2）P2（钠盐）是许多肌醇磷酸酯（InsP）异构体之一，可在细胞信号传输中充当小的可溶第二信使。1,2,3结合Ins（1,4 ，5）P3在内质网上的受体导致钙通道的开放和细胞内钙的增加。 Ins(1,2)P2 (sodium salt) is one of the many inositol phosphate (InsP) isomers that could act as small, soluble second messengers in the transmission of cellular signals.1,2,3 Binding of Ins(1,4,5)P3 to its receptor on the endoplasmic reticulum causes opening of the calcium channels and an increase in intracellular calcium.