title: Serotonin, free amino-acids, and related substances occurring in the blood and nervous tissue of Helix aspersa (gastropoda mollusca).
mesh_terms: D000596:Amino Acids / Q000097:blood / Q000378:metabolism*; D000818:Animals; D001345:Autoradiography; D002247:Carbon Isotopes; D002845:Chromatography; D003619:Dansyl Compounds / Q000032:analysis; D005724:Ganglia / Q000378:metabolism; D066298:In Vitro Techniques; D009420:Nervous System / Q000378:metabolism*; D012701:Serotonin / Q000097:blood / Q000378:metabolism*; D012908:Snails / Q000502:physiology*; D014363:Tryptamines / Q000378:metabolism
chemical_list: D000596:Amino Acids; D002247:Carbon Isotopes; D003619:Dansyl Compounds; D014363:Tryptamines; D012701:Serotonin