HAMBURG, Germany Monoclonal antibodies and their various derivatives now represent the biotechnology industry's dominant, incumbent technology. Six of the top 10 best-selling drugs are antibodies. Two more top 10 drugs are biologics based on fusion protein designs. In all, there are around a hundred antibodies on the market. Whether cell and gene therapy (CAGT) will ever attain that level of success was the subject of two lively panel discussions on deal trends and valuation and on collaboration and integrated development of advanced therapies which closed the 25th anniversary edition of BIO-Europe Wednesday.