title: Extraction from ox retractor penis of an inhibitory substance which mimics its atropine-resistant neurogenic relaxation.
abstract: The inhibitory post-ganglionic transmission in the retractor penis of the ox resembles that of the dog and is not cholinergic or adrenergic. Acid extracts of this tissue have yielded an unidentified, labile, inhibitory substance which mimics the effect of its inhibitory nerves.
mesh_terms: D000818:Animals; D001285:Atropine / Q000494:pharmacology*; D001338:Autonomic Fibers, Postganglionic / Q000502:physiology; D002417:Cattle; D004351:Drug Resistance; D066298:In Vitro Techniques; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects*; D010413:Penis / Q000187:drug effects; D009435:Synaptic Transmission / Q000187:drug effects; D013997:Time Factors; D014020:Tissue Extracts / Q000494:pharmacology*
chemical_list: D014020:Tissue Extracts; D001285:Atropine