I. Introduction.- 1. B Cell/Leukemia Panel Workshop: Summary and Comments.- II. Serologic Specificity of B Cell/Leukemia Monoclonal Antibodies.- 2. Analysis of the B Cell/Leukemia Workshop Monoclonal Antibodies Using an Immunoenzymatic Staining Assay and a Radioimmunoassay on Cells.- 3. Analysis of Ten B Lymphocyte-Specific Workshop Monoclonal Antibodies.- 4. Screening of Workshop B Series Antibodies by Radioimmunobinding to Human Leukocyte Cell Lines and to Cells from Human Lymphoid Tumors.- 5. Expression of Lymphocyte Differentiation Antigens in Immunodeficiency Diseases.- 6. Use of Two Monoclonal Anti-Human B Cell Antibodies in the Study of Early B Cell Differentiation.- 7. Characterization of a Human B Lymphocyte-Specific Antigen Defined by Monoclonal Antibodies HD6 and HD39.- 8. Six Distinct Antigen Systems of Human B Cells as Defined by Monoclonal Antibodies.- 9. B-C1, B-C2, B-C3: Monoclonal Antibodies against B Cell Differentiation Antigens.- 10. Human B Cells: Is FMC7 a Marker for Relatively Mature B Cells or Does It Define a Population Equivalent to the LyB5-Negative Mouse B Cells?.- 11. Spontaneous Mouse Erythrocyte Rosette Formation (M-RFC) with Human B Lymphocytes: Diagnostic Value in B-Lymphoproliferative Diseases and Lack of Relationship to B Cell Protocol Monoclonal Antibodies.- III. Biochemical Analysis of Antigens Defined by the Workshop B Cell/Leukemia Panel.- 12. Human B Cell Surface Molecules Defined by an International Workshop Panel of Monoclonal Antibodies.- 13. Structural Analysis of Cell Surface Molecules Recognized by Leukemic Cell/B Cell Panel Antibodies.- 14. Biochemical Analysis of Antigens Recognized by Workshop B Series Antibodies, Using Western Blotting.- 15. Human B Cell Antigens Detected by the Workshop Antibodies: A Comparison of Serological and Immunochemical Patterns.- 16. Further Evidence that the Human Differentiation Antigen p24 Possesses Activity Associated with Protein Kinase.- 17. Clustering of Anti-Leukemia and Anti-B ló˝