We can now study regulatory regions and functional domains of the protein in the context of a true erythroid environment , experiments that have not been possible heretofore .
we can now study regulatory regions and functional domains of the protein in the context of a true erythroid environment , experiments that have not been possible heretofore .
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 O O O O