Protides of the Biological Fluids reviews trends in research concerning protides of the biological fluids, with emphasis on tumor-associated antigens (TAAs), lectins, and separation methods such as electrophoresis and isoelectric focusing. Examples of TAAs discussed in this book are carcinoembryonic antigens, mesenchyme-associated antigens, and oncofetal pancreatic antigens. The mode of action of lectins as well as lectin-binding sites are also considered. This book is comprised of 195 chapters and begins with an overview of the strategy and monitoring of protein fractionation, followed by a discussion on the self-nonself concept of cancer and ""autoimmune"" diseases; presence of trophoblast antigens on the membranes of some human tumor and transformed cells; and non-specific cross-reacting antigens in human blood monocytes. Subsequent chapters explore the metabolism of carcinoembryonic antigen and alpha-fetoprotein during delivery; amino acid sequence identity of tissue polypeptide antigen fragments from different sources; isoferritins, glycoproteins, and viral antigens; and crossed immunoelectrophoresis of yeast plasma membrane lectin receptors. The final section is devoted to separation techniques such as isotachophoresis, chromatography, electrophoresis, and isoelectric focusing. This monograph will be of value to biologists and researchers interested in protides of the biological fluids.