Mersana Therapeutics, Inc., a clinical-stage biopharmaceutical company focused on discovering and developing a pipeline of antibody-drug conjugates (ADCs) targeting cancers in areas of high unmet medical need, today announced a research collaboration and license agreement with Janssen Biotech, Inc., one of the Janssen Pharmaceutical Companies of Johnson & Johnson, to discover novel ADCs for three targets. The agreement was facilitated by Johnson & Johnson Innovation.