A second hypersensitive site ( HS 2 ) was identified within the first intron in pre-monocytic cells , which express Elk-1 only when differentiating to monocytes .
a second hypersensitive site ( hs 2 ) was identified within the first intron in pre-monocytic cells , which express elk-1 only when differentiating to monocytes .
O O O O O O O O O O O O O O O O O O O O O O O O O B-cell_type O