An erythroid progenitor cell is Kit-positive, Ly6A-negative, CD41-negative, CD127-negative, and CD123-negative. This cell type is also described as being lin-negative, Kit-positive, CD150-negative, CD41-negative, CD105-positive, and FcgR-negative. [ http://www.ncbi.nlm.nih.gov/pubmed/19805084 http://www.immgen.org/index_content.html ]