However , the expression of certain mammary progenitor subpopulations , such as CD49f+ ESA+ CD44+ , drops significantly in later passages .
Cell surface progenitor - associated markers are rapidly induced in normal mouse ME - CRCs relative to ME cells .
The expression of certain mammary progenitor subpopulations , such as CD49f+ ESA+ CD44+ , drops significantly in later passages .
Cell surface progenitor - associated markers are rapidly induced in normal mouse ME - CRCs relative to ME cells .