Contents 



1. Antibodies I - 1 



Immunity 1 



Specificity 6 



2. Antibodies II 12 



Specificity and Chemical Structure of Antigen 12 



Statistical Methods 20 



Limitations of Specificity 26 



Combining- Groups of Antibody 27 



Formation of Antibody 29 



3. Antigens 34 



Definition 34 



Antigenicity 34 



4. Blood Groups 50 



ABO Blood Groups 50 



MNS Blood Groups 57 



Rh Groups 58 



Other Blood Groups 62 



5. Plant Agglutinins (Lectins) I 64 



Specificity of Proteins Other Than Antibodies 64 



Plant Agglutinins 65 



6. Plant Agglutinins (Lectins) II 72 



Nature of Plant Agglutinins 72 



Specificity of Plant Agglutinins -". 75 



Role of Agglutinins in the Plant 82 



Lessons from the Study of Lectins 83 



7. Blood Group Antigens 85 



Sources of Antigens for Study 85 



Blood Group Substances A, B, H, and Le" 85 



Other Human Red Cell Receptors 93 



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