title: Methionine enkephalin and morphine alter monoamine and cyclic nucleotide levels in the cerebral ganglia of the freshwater bivalve Anodonta cygnea.
mesh_terms: D000818:Animals; D000242:Cyclic AMP / Q000378:metabolism*; D006152:Cyclic GMP / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism*; D004723:Endorphins / Q000494:pharmacology*; D004745:Enkephalins / Q000494:pharmacology*; D005724:Ganglia / Q000187:drug effects / Q000378:metabolism*; D008974:Mollusca; D009020:Morphine / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology
chemical_list: D004723:Endorphins; D004745:Enkephalins; D009270:Naloxone; D009020:Morphine; D000242:Cyclic AMP; D006152:Cyclic GMP; D004298:Dopamine