tokens: The L gene produces the erythroid ( R-PK ) or the hepatic ( L-PK ) isozymes by the alternative use of two promoters .
folded_tokens: the l gene produces the erythroid ( r-pk ) or the hepatic ( l-pk ) isozymes by the alternative use of two promoters .
labels: O B-DNA_domain_or_region I-DNA_domain_or_region O O B-protein_molecule O B-protein_molecule O O O B-protein_molecule I-protein_molecule B-protein_molecule O O O O O O O O B-DNA_domain_or_region O