Preface 1. Chapter title to be determined Shahzad Zafar Iqbal 2. Epigenetic regulation of angiogenesis in tumor progression Domenico Ribatti 3. RecBCD and Chi hotspots as determinants of self vs. non-self: A re-evaluation Gerald R. Smith 4. Horizontal gene transfer to plants from Agrobacterium and related bacterial species Benoit Lacroix