This growth modulator was semipurified and had an estimated molecular weight 13 , 000 to 24 , 000 Da .
this growth modulator was semipurified and had an estimated molecular weight 13 , 000 to 24 , 000 da .
O B-protein_family_or_group I-protein_family_or_group O O O O O O O O O O O O O O O O O