Inhibition of phosphorylase kinase, and tyrosine protein kinase activities by quercetin.

Abstract

Quercetin, a naturally occurring bioflavonoid inhibited the activities of phosphorylase kinase and a partially purified tyrosine protein kinase from rat lung. The inhibition was rapid and concentration dependent. Quercetin at 100 microM inhibited the activities of phosphorylase kinase and tyrosine protein kinase by about 95 and 80-90 percent respectively… (More)

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