Various other genes , for example interleukin-1 and MHC class II genes , contain an octamer sequence in the promoter and are expressed in cells of both the immune and nervous systems .
various other genes , for example interleukin-1 and mhc class ii genes , contain an octamer sequence in the promoter and are expressed in cells of both the immune and nervous systems .
O O O O O O O O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region O O O O O O O O O O O O O