There are other elements regulating IL-4 gene expression , however , and the relative importance of these recently identified proteins has yet to be determined .
there are other elements regulating il-4 gene expression , however , and the relative importance of these recently identified proteins has yet to be determined .
O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O O O O O O O O O O O O