The substrate solution used for assaying lipid kinases.

Formulation: Frozen substrate solution containing 1 mM of Phospha-tidylinositol 4,5-biphosphate [PI(4,5)P2 or PtdIns(4,5)P] in 1X lipid dilution buffer

For optimal storage, aliquot diluted product into smaller quantities and store at recommended temperature. For most favorable performance, avoid repeated handling and multiple freeze/thaw cycles.