Receptor for erythropoietin, which mediates erythropoietin- induced erythroblast proliferation and differentiation (PubMed:10388848, PubMed:2163695, PubMed:2163696, PubMed:8662939, PubMed:9774108). Upon EPO stimulation, EPOR dimerizes triggering the JAK2/STAT5 signaling cascade (By similarity). In some cell types, can also activate STAT1 and STAT3 (PubMed:11756159). May also activate the LYN tyrosine kinase (By similarity). {ECO:0000250|UniProtKB:P14753, ECO:0000269|PubMed:10388848, ECO:0000269|PubMed:11756159, ECO:0000269|PubMed:2163695, ECO:0000269|PubMed:2163696, ECO:0000269|PubMed:8662939, ECO:0000269|PubMed:9774108}. [Isoform EPOR-T]: Acts as a dominant-negative receptor of EPOR-mediated signaling. . This is the function of Ensembl gene identifier ENSG00000187266 (EPOR, erythropoietin receptor).