Biology — Antibody Production (Clonal Selection)

{
  "elements":[
    {"data":{"id":"ag","label":"Antigen enters"}},
    {"data":{"id":"apc","label":"Antigen-presenting cell"}},
    {"data":{"id":"th","label":"Helper T cell"}},
    {"data":{"id":"b","label":"Matching B cell"}},
    {"data":{"id":"clone","label":"Clonal expansion"}},
    {"data":{"id":"plasma","label":"Plasma cells"}},
    {"data":{"id":"ab","label":"Antibodies"}},
    {"data":{"id":"mem","label":"Memory B cells"}},
    {"data":{"source":"ag","target":"apc"}},
    {"data":{"source":"apc","target":"th"}},
    {"data":{"source":"th","target":"b","label":"activates"}},
    {"data":{"source":"b","target":"clone"}},
    {"data":{"source":"clone","target":"plasma"}},
    {"data":{"source":"plasma","target":"ab"}},
    {"data":{"source":"clone","target":"mem"}}
  ],
  "layout":{"name":"breadthfirst","directed":true}
}