Induction of morphine tolerance by material extracted from brain of tolerant animals.
D000818:Animals; D001921:Brain / Q000378:metabolism*; D055598:Chemical Phenomena; D002621:Chemistry; D004285:Dogs; D066298:In Vitro Techniques; D007279:Injections, Subcutaneous; D008297:Male; D051379:Mice; D009020:Morphine / Q000378:metabolism*; D010455:Peptides; D051381:Rats; D014020:Tissue Extracts
D010455:Peptides; D014020:Tissue Extracts; D009020:Morphine