as part of the development of a multi-endpoint , in vivo , mouse model for mutagenesis we have measured the frequency of sister-chromatid exchange ( sce ) and the frequency of thioguanine-resistant ( tgr ) cells among the lymphocytes of the mouse spleen following acute , intraperitoneal exposure to ethylnitrosourea ( enu ) .
C0037211
sister-chromatid exchange
C0007634
the