A switch from human fetal ( gamma ) -to adult ( beta ) -globin expression occurs within erythroid precursor cells of the adult lineage .
a switch from human fetal ( gamma ) -to adult ( beta ) -globin expression occurs within erythroid precursor cells of the adult lineage .
O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O B-cell_type I-cell_type I-cell_type O O B-cell_type I-cell_type O