Early thymic progenitors (ETPs) Marker ExpressionCommonCD4 Expression: -Required markerRequiredCD8a Expression: -Required markerRequiredMouseCD25 (IL-2RA) Expression: -Citations:[1][2]Suggested markerSuggestedKIT (CD117) Expression: ++/+++Citations:[1][2]Suggested markerSuggestedCD44 Expression: + Analysis strategy: CD44+CD25- thymocytes are a heterogeneous population, not only ETPsCitations:[1][2]HumanCD1a Expression: -Citations:[1]Suggested markerSuggestedCD7 Expression: -Citations:[1]CD34 Expression: +Citations:[1]Cell/subset InformationETPs are the earliest stage of thymic T cell development. They migrate to the thymus from the bone marrow.AliasesETPsDN1 T cellsDN1 thymocytesTagsT lymphocytelymphoidhematopoieticmesodermInformationCreated Michael Lehrke2025-04-12, 02:56:16 UTCUpdated Michael Lehrke2025-11-10, 04:59:44 UTCApproved Michael Lehrke2025-11-10, 04:59:44 UTC