H-89 is a specific adenylyl cyclase inhibitor (DDA) and a cyclic AMP-dependent protein kinase inhibitor. H-89 blocks the action of equine growth hormone on in vitro maturation of equine oocytes. H-89 decreases the gain of excitation-contraction coupling and attenuates calcium sparks in the absence of beta-adrenergic stimulation. H-89 potentiates adipogenesis in 3T3-L1 cells by activating insulin signaling independently of protein kinase A.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.