Biology — Erythropoiesis

{
  "elements":[
    {"data":{"id":"o2","label":"Low O2 in blood"}},
    {"data":{"id":"epo","label":"Erythropoietin (kidney)"}},
    {"data":{"id":"stem","label":"Haematopoietic stem cell"}},
    {"data":{"id":"pro","label":"Proerythroblast"}},
    {"data":{"id":"retic","label":"Reticulocyte"}},
    {"data":{"id":"rbc","label":"Red blood cell"}},
    {"data":{"source":"o2","target":"epo"}},
    {"data":{"source":"stem","target":"pro"}},
    {"data":{"source":"epo","target":"pro","label":"stimulates"}},
    {"data":{"source":"pro","target":"retic","label":"loses nucleus"}},
    {"data":{"source":"retic","target":"rbc"}}
  ],
  "layout":{"name":"breadthfirst","directed":true}
}