these data support the concept that a factor possibly derived from t cells is missing from this patient 's serum and that this factor is required for the maturation of the b cell for immunoglobulin synthesis.a patient with x-linked agammaglobulinemia had a population of circulating lymphocytes with some surface characteristics that appeared similar to those of the b cells from the patient with thymoma .
C1511002
maturation
C0004561
b cells