The precipitation of reagin and thermostabile (blocking) antibody with ammonium sulphate in ragweed-sensitive serum.  I.  Technique.
D031164:Ambrosia; D000645:Ammonium Sulfate; D019138:Antibodies, Blocking; D002980:Climate; D006801:Humans; D011935:Reagins
D019138:Antibodies, Blocking; D011935:Reagins; D000645:Ammonium Sulfate
RAGWEED