K+ channel blockade by progesterone is specific ; other steroid hormones had little or no effect , although the progesterone antagonist RU 486 also blocked KV and KCa channels .
k+ channel blockade by progesterone is specific ; other steroid hormones had little or no effect , although the progesterone antagonist ru 486 also blocked kv and kca channels .
B-atom O O O B-lipid O O O O B-lipid I-lipid O O O O O O O O B-lipid O B-other_organic_compound I-other_organic_compound O O B-protein_family_or_group O B-protein_family_or_group O O