develops from develops from myeloid cell mast cell progenitor MCP colony forming unit mast cell CFU-Mast A progenitor cell of the mast cell lineage. Markers for this cell are FceRIa-low, CD117-positive, CD9-positive, T1/ST2-positive, SCA1-negative, and lineage-negative. CFU-MC MCP are CD16-positive, CD32-positive, CD34-positive, CD45-positive, integrin beta-7-positive, and lin-negative (CD2, CD3e, CD4, CD5, CD8a, CD14, CD19, CD20, CD27, integrin alpha-M, ly6c, ly6g, NCAM-1, and ter119). These cells also express the transcription factors GATA-1, GATA-2, and MITF, but not C/EBPa. myeloid lineage restricted progenitor cell basophil mast progenitor cell