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Thank you for your inquiry. My colleague is currently on tour for Abcam in Germany, but before she left she inquired about the endotoxin level of S100A9 protein ab109951. I was informed that, regrettably, the Endotoxin concentration of this protein is above 1.0 EU per 1 microgram of protein as determined by LAL method. I hope this information is helpful to you. Please do not hesitate to contact us if you need any more advice or information.
Abcam Scientific Support
Answered on Nov 28 2011