however , because the partially purified , el4-derived supernatant used as bcgf in these studies has not been purified to homogeneity , we can not conclude whether the factors that induce resting b cells to increase in size are the same as the growth factors that synergize with anti-mu to induce b cell proliferation or that maintain the proliferation of activated b cells .
C0004561
b cells
C1155008
b cell proliferation