Ethanolamine-phosphate cytidylyltransferase that catalyzes the second step in the synthesis of phosphatidylethanolamine (PE) from ethanolamine via the CDP-ethanolamine pathway (PubMed:31637422, PubMed:9083101). Phosphatidylethanolamine is a dominant inner-leaflet phospholipid in cell membranes, where it plays a role in membrane function by structurally stabilizing membrane-anchored proteins, and participates in important cellular processes such as cell division, cell fusion, blood coagulation, and apoptosis (PubMed:9083101). {ECO:0000269|PubMed:31637422, ECO:0000269|PubMed:9083101, ECO:0000303|PubMed:9083101}. This is the function of ENSG00000185813 (PCYT2, phosphate cytidylyltransferase 2, ethanolamine).