Endotoxin content was assayed using a LAL gel clot method. Endotoxin level was found to be less than 0.1 ng/ug (1EU/ug).
Activity:
Activity was determined by the ability to chemoattract human peripheral blood eosinophils using a concentration range of 0.1-20.0 ng/mL.
Storage Buffer:
Lyophilized from PBS
Storage Instruction:
Store at -20°C on dry atmosphere for 2 years. After reconstitution with deionized water, store at 4°C for 1 month or store at -20°C for 6 months.Aliquot to avoid repeated freezing and thawing.