The mean number of type I and type II receptors was significantly lower in aged subjects than in controls ( respectively , 198 +/- 96 and 272 +/- 97 receptors /cell for type I , and 1 , 794 +/- 803 and 3 , 339 +/- 918 for type II receptors ) .
the mean number of type i and type ii receptors was significantly lower in aged subjects than in controls ( respectively , 198 +/- 96 and 272 +/- 97 receptors /cell for type i , and 1 , 794 +/- 803 and 3 , 339 +/- 918 for type ii receptors ) .
O O O O O O O O O O O O O O B-multi_cell I-multi_cell O O B-multi_cell O O O O O O O O O B-other_name B-protein_family_or_group O O B-protein_family_or_group I-protein_family_or_group O O O O O O O O O O O O O O O B-protein_family_or_group I-protein_family_or_group O O