Definition of "immunoreactivity" [immunoreactivity]

• A measure of the immune reaction caused by an antigen (noun)

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• "Chowen, JA, et al. Sexual dimorphisms and sex steroid modulation of glial fibrillary acidic protein messenger RNA and immunoreactivity levels in the hypothalamus."
• "Garcia-Segura, LM, et al. Astrocytic shape and glial fabrially acidic protein immunoreactivity are modified by estradiol in primary rat hypothalamic cultures."
• "Garcia-Segura, LM, et al. Gonadal hormone regulation of fibrillary acidic protein immunoreactivity and glial ultrastructure in the rat neuroendocrine hypothalamus."