Protein assay methods are used for protein identification with blood groups, cell surface markers, drugs and toxins. This text features comprehensive protocols essential for researchers studying various areas of biological and medical sciences. The techniques in this text are presented in a friendly step-by-step fashion, providing useful tips and potential pitfalls while enabling researchers at all stages to embark on basic problems using a vareity of technologies and model systems. Focus on protein identification using mass spectrometry Step-by-step procedures detailing materials, procedures, comment and pitfalls Information on the plethora of technologies needed to tackle complex problems