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DHEA-S and DHEA are very similar molecules: our antibody has more affinity for DHEA compared to DHEA-S (10 % higher). You have to consider that in human blood the quantity of DHEA is 1.000 times lower than DHEA-S (from clinical point of view the elevated cross reactivity of DHEA does no affect the results).
達偉 鄭Abcam Scientific Support
Answered on Dec 17 2013