Abstract
We transferred murine NIH 3T3 metaphase chromosomes into monkey CV-1 cells to investigate the different ouabain sensitivities of rodent and primate cells. In 16 ouabain-resistant transferents, the mouse Na,K-ATPase α1 subunit gene was detected, suggesting that structural differences between the rodent and primate α1 subunits determine the different ouabain sensitivities.