Interesting paper from Genentech. Sounds like a new and potentially better way to do bispecifics. <a href="http://www.ncbi.nlm.nih.gov/pubmed/19299620?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DefaultReportPanel.Pubmed_RVDocSum" rel="nofollow" target="_blank">http://www.ncbi.nlm.nih.gov/pubmed/19299620?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DefaultReportPanel.Pubmed_RVDocSum</a>