Abstract
Summary
The subcutaneous injection of spleen pulp from heterozygous Rockland mice into homozygous dba line 1 mice caused a significant increase in the mitotic activity in the epithelium of the crypts of Lieber-kuhn, whereas the injection of the spleen pulp from dba mice into mice of the same strain was without significant effect, and the injection of Rockland spleen into Rockland mice caused a mitotic decrease of borderline significance.
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