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]Half maximal effective concentration (EC₅₀) is a measure of the concentration of a drug, antibody or toxicant which induces a biological response halfway between the baseline and maximum after a specified exposure time. More simply, EC₅₀ can be defined as the concentration required to obtain a 50% [...] effect and may be also written as [A]₅₀. It is commonly used as a measure of a drug's potency,

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