Sigma-Aldrich Serum

Sigma-Aldrich Serum, 10 mL Volume, Donkey Source Species, Non-Sterile, -20 deg C, Faint Yellow to Orange to Light Brown, Liquid Form. Donkey serum is pooled from a normal donor herd. In immunoassays, normal donkey serum can serve as a blocking agent and a control. It is used as a blocking agent in various studies for immunohistochemistry and immunocytochemistry, ranging from 5% to 20% - SIALGSK (Additional S&H or Hazmat Fees May Apply)