TABLE 2

TPMT and HPRT activity (mean ± S.E.M.) in RBC and WBC from untreated Msh2+/+, Msh2+/−, and Msh2−/− mice

Genotype RBC WBC Murine Embryonic Fibroblasts
TPMT TPMT HPRT TPMT HPRT
U/ml packed RBC nmol / h / 109 cells nmol / h / 106 cells nmol / h / 109 cells nmol / h / 106 cells
Msh2−/− 7.6 ± 3.1 10.4 ± 3.5 8.2 ± 0.9 6.1 ± 3.9 17.6 ± 0.8
Msh2+/− 6.8 ± 1.9 8.3 ± 3.2 5.2 ± 1.1 N/A N/A
Msh2+/+ 7.4 ± 1.9 16.8 ± 3.0 8.2 ± 1.9 26.2 ± 5.3 16.2 ± 1.4