Aegean Conferences is an independent, nonprofit, educational organization directed and managed by the scientific community. The board is made up of nine researchers/scientists in various disciplines from Harvard, Brown, University of Pennsylvania, UCSD, Princeton, Biovista and the Foundation for Biomedical Research Academy of Athens. The board both invites and approves unsolicited proposals for Conferences in all fields of Science, Engineering, Arts, and Humanities. The purpose of the Conferences is to bring together individuals with common interests to examine the emerging and most advanced aspects of their particular field. In this respect, scientists from around the world will convene at the Fourth Aegean Conferences Workshop on Complement Associated Diseases, Animal Models, and Therapeutics (June 10-15, 2007), to discuss recent advances in this fast evolving field. This volume represents a collection of topics on the "novel" functions of complement, patho-physiology, prot.