MHC class II molecules also serve as receptors for B-cell stimulation by microbial superantigens .
mhc class ii molecules also serve as receptors for b-cell stimulation by microbial superantigens .
B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O O O B-cell_type O O B-protein_family_or_group I-protein_family_or_group O