data from three- and four-color immunofluorescence analyses with xid , athymic ( nude ) , and normal mice suggest that the order in which these antigens are lost during b cell differentiation distinguishes two b cell lineages : immature b cells express both antigens , intermediate-stage b cells of one or the other lineage express only bla-1 or only bla-2 , respectively , and mature resting b cells express neither .
C1511002
b
C0004561
b cell