]> proerythroblast FMA:83518 rubriblast pronormoblast An immature, nucleated erythrocyte occupying the stage of erythropoeisis that follows formation of erythroid progenitor cells. This cell is CD71-positive, has both a nucleus and a nucleolus, and lacks hematopoeitic lineage markers. proerythroblast nucleated CD4 molecule has characteristic bearer_of bearer of has characteristic is bearer of erythroid progenitor cell erythroid lineage cell nucleate cell develops_from develops from develops from has part has part has_part nucleolus lacks_plasma_membrane_part CD19 molecule integrin alpha-M CD3 epsilon neural cell adhesion molecule 1 CD2 molecule T-cell surface glycoprotein CD8 alpha chain membrane-spanning 4-domains subfamily A member 1 T-cell surface glycoprotein CD5 CD14 molecule transferrin receptor protein 1 lymphocyte antigen 6G has plasma membrane part high nuclear/cytoplasmic ratio basophilic cytoplasm