title: [On the specificity of a stimulating substance (factor X) isolated under the influence of acetylcholine from frog cardiac ventricles and rabbit right auricles].
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology*; D000818:Animals; D001001:Anura; D005170:Factor X; D006321:Heart; D006352:Heart Ventricles; D011817:Rabbits; D011898:Ranidae
chemical_list: D005170:Factor X; D000109:Acetylcholine
keywords: ACETYLCHOLINE/pharmacology; HEART/extracts