Rhesus macaque (Macaca mulatta). Female rhesus macaques were of Indian origin and weighed 4-5.5 kg at the time of blood sampling. In a separate experiment, these animals were previously exposed to human butyrylcholinesterase (July 2003), physostigmine (October 2003), and huprezine A (December 2003). These animals were certified to be in good health at the time of the blood collection (June 17, 2004). Whole blood tissue from each donor was collected using a 5 cc syringe and immediately injected into a PAXgene™ Blood RNA Collection Tube (PreAnalytiX, Franklin Lakes, NJ). Whole blood tissue was withdrawn from the right or left saphenous vein. Approximately 1.0 mL of whole blood tissue was obtained from the rhesus macaques. All samples were incubated in the PAXgene™ Blood RNA tube for 24 hrs at room temperature prior to RNA extraction. Keywords = rhesus macaque Keywords = macaca mulatta Keywords = non-human primate Keywords = blood