Definition of "inactivation" [inactivation]

• The process of rendering something inactive (noun)

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• "Because transpositions result in inactivation of neighbouring genes, McClintock used the term "controlling elements" to describe the mobile chromosome structures."
• "Seeing that it’s involved in inactivation/metabolism of norepinephrine and dopamine (neurotransmitters), this may be similar in effect to reuptake inhibitors or catecholamine agonists ... you know, like amphetamines ...."
• "However, even at the first five passages, the resulting cells showed variations in X chromosome inactivation, meaning some cells had inactivated one X chromosome and some had not."