Biology — Allergic Response

{
  "elements":[
    {"data":{"id":"allergen1","label":"First exposure (allergen)"}},
    {"data":{"id":"ige","label":"IgE antibodies"}},
    {"data":{"id":"mast","label":"Coat mast cells"}},
    {"data":{"id":"allergen2","label":"Second exposure"}},
    {"data":{"id":"degran","label":"Mast cell degranulation"}},
    {"data":{"id":"hist","label":"Histamine release"}},
    {"data":{"id":"symptoms","label":"Inflammation / symptoms"}},
    {"data":{"source":"allergen1","target":"ige"}},
    {"data":{"source":"ige","target":"mast"}},
    {"data":{"source":"allergen2","target":"degran"}},
    {"data":{"source":"mast","target":"degran","label":"cross-linking"}},
    {"data":{"source":"degran","target":"hist"}},
    {"data":{"source":"hist","target":"symptoms"}}
  ],
  "layout":{"name":"breadthfirst","directed":true}
}