a study was made of the ability of polyacrylic acid , poly-4-vinylpyridine , and the copolymers 4-vinylpyridine and 4-vinyl-n-alkylpyridinium bromides with side hydrocarbonic radicals of varying length to induce in mice of different strains b-cell differentiation into the plaque-forming cells without antigenic stimulation .
C1511002
b-cell differentiation
C0007634
cells