Hardy Fr. E (Immature B cells) Marker ExpressionCommonCD19 Expression: +Required markerRequiredCD43 Expression: -Required markerRequiredIgM Expression: + Localization: surfaceRequired markerRequiredIgD Expression: - Localization: surfaceMouseB220 (CD45R) Expression: +Suggested markerSuggestedCell/subset InformationImmature B cell stage after subsequent rearrangement of the BCR light chain.AliasesImmature B cellsHardy Fraction EHardy Fr ETagsB lymphocytelymphoidhematopoieticmesodermInformationCreated Michael Lehrke2025-04-12, 00:09:35 UTCUpdated Michael Lehrke2025-04-12, 00:09:47 UTC