Assertion: central nervous system's cord | /r/HasProperty | assayed for acetylcholinesterase
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text: Selected rats were killed 4 hours after DFP, PSP, mipafox, dichlorvos, and carbaryl or 48 hours after TOTP and malathion and the brains and spinal cords were removed and assayed for acetylcholinesterase (AChE) and neurotoxic-esterase (NTE) activity.