Apparent differences in B-lineage differentiation occurring in fetal and adult life.
D000367:Age Factors; D000818:Animals; D001402:B-Lymphocytes / Q000166:cytology* / Q000276:immunology; D002454:Cell Differentiation; D007072:Immunoglobulin D / Q000276:immunology*; D051379:Mice; D011947:Receptors, Antigen, B-Cell / Q000276:immunology
D007072:Immunoglobulin D; D011947:Receptors, Antigen, B-Cell