to define the neural-specific expression of rat repetitive identifier ( id ) dna , we co-transfected an intron b subclone of the rat growth hormone ( rgh ) gene , containing a tandem array of two type 2 repeats and a single id monomer , and a plasmid conferring neomycin resistance into human sk-n-mc neuroblastoma , hela epidermal carcinoma , 293 kidney and 251 mg glioblastoma cells .
C0021920
intron
C0007634
cells