Erytropoietin er et glykoprotein, der som mitosestimulerende faktor og differentierende hormon stimulerer dannelsen af erytrocytter ved at stimulere forstadier i knoglemarven.
Erythropoietin is a glycoprotein that stimulates, as a mitosis-stimulating factor and differentiating hormone, the formation of erythrocytes from precursors of the stem cell compartment.