Pharmaceutical Privately-held US biotech startup Epizyme says it has received a$4 million in milestone payments from UK pharma giant GlaxoSmithKline (LSE: GSK) based on the achievement of preclinical milestones. Last year, Epizyme and GSK formed a worldwide strategic alliance to discover, develop, and market novel small molecule therapeutics targeting histone methyltransferases (HMTs), an important class of epigenetic enzymes, for the treatm 3 October 2012