05-11-2005, 09:10 AM
Which of the following events occurs first in the differentiation sequence of human B cells in the bone marrow? A. Cytoplasmic mu chains present in the B cell
B. Immunoglobulin heavy chain rearrangement
C. Immunoglobulin light chain rearrangement
D. Surface IgD and IgM present on the B cell
E. Surface IgM present on the B cell
B. Immunoglobulin heavy chain rearrangement
C. Immunoglobulin light chain rearrangement
D. Surface IgD and IgM present on the B cell
E. Surface IgM present on the B cell