sentences:  Ataxia telangiectasia and Rad3 related
  
  Serine/threonine-protein kinase ATR also known as ataxia telangiectasia and Rad3-related protein (ATR) or FRAP-related protein 1 (FRP1) is an enzyme that, in humans, is encoded by the "ATR" gene.ATR belongs to the phosphatidylinositol 3-kinase-related kinase protein family.