产品名称：Caffeine
产品价格：350   
产    地：sigma
产品货号：C0750
产品规格：25G
产品说明：
CAS Number 58-08-2
Empirical Formula （Hill Notation） C8H10N4O2
Molecular Weight 194.19
grade    ReagentPlus® 
form    powder 
color    white 
mp    234-236.5 °C（lit.） 
solubility    H2O: soluble15 mg/mL 
Description
Caution
Keep tightly sealed.
Packaging
1 kg in poly bottle
5, 100 g in poly bottle
Legal Information
ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC
Biochem/physiol Actions
A central nervous system stimulant believed to act through adenosine receptors and monoamine neurotransmitters. It is an adenosine receptor antagonist and adenosine 3′,5′-cyclic monophosphate （cAMP） phosphodiesterase inhibitor. Thus, levels of cAMP increase in cells following treatment with caffeine. It has been reported to affect cellular calcium levels, releasing calcium from intracellular stores. It overrides the cell cycle effects of various chemicals such as protease inhibitors, preventing apoptosis; and it has been shown to inhibit cellular DNA repair mechanisms.