analysis of the tissue distribution revealed expression of the bp-3 reactive molecule on normal pre-b and b cells in the bone marrow , 35 % of b cells in the circulation , 30 % of the b cells in the spleen , and less than or equal to 20 % of b cells in lymph nodes , peritoneal cavity , and peyer 's patches .
C1292769
pre-b
C0004561
b cells