Response Genetics has achieved its third milestone in its collaboration with GlaxoSmithKline related to the issuance of a U.S. patent for detection of BRAF Mutations, triggering a payment of $500,000 to Response Genetics.   The companies entered a non-exclusive license agreement in March 2010, under which GSK gained a non-exclusive license to Response Genetics PCR analysis technology and diagnostic expertise to assess BRAF gene mutations in human tumor samples, in support of the development of G...