tokens: The expression levels of human RAR alpha ( hRAR alpha , receptor for all-trans RA ) and the human retinoid-X receptor alpha ( hRXR alpha receptor for 9-cis RA ) were determined by Northern blot analysis .
folded_tokens: the expression levels of human rar alpha ( hrar alpha , receptor for all-trans ra ) and the human retinoid-x receptor alpha ( hrxr alpha receptor for 9-cis ra ) were determined by northern blot analysis .
labels: O O O O B-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O B-other_organic_compound I-other_organic_compound O O O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule I-protein_molecule I-protein_molecule O B-other_organic_compound I-other_organic_compound O O O O O O O O