Look up: Genistein

1. 
   genistein
   (= 4,5,7-trihydroxyisoflavone) Inhibitor of protein tyrosine kinases. Competes at ATP binding site and will inhibit other kinases to some extent.
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2. 
   genistein
   <chemical> An isoflavonoid derived from soy products. It inhibits protein-tyrosine kinase and topoisomerase-II (DNA topoisomerase (ATP-hydrolysing)) activity and is used as an antineoplastic and antitumour agent. Experimentally, it has been shown to induce g2 phase arrest in human and murine cell lines. ... Pharmacological action: anticarcinog ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
3. 
   Genistein
   `Genistein` is one of several known isoflavones. Isoflavones, such as genistein and daidzein, are found in a number of plants, with soybeans and soy products like tofu and textured vegetable protein being the primary food source. Soy isoflavones are a group of compounds found in and isolated from the soybean. Besides functioning as antioxidants, many isoflavones have been shown to interact with animal and human estrogen receptors, causing effects...
   Found on http://en.wikipedia.org/wiki/Genistein