Intracellular K + and the expression of transformation parameters by chick cells transformed with the Bryan strain of Rous sarcoma virus

Abstract

As normal chick embryo (CE) cells entered quiescence the intracellular concentrations of both Na + and K + declined. Comparable decreases in intracellular concentrations of Na + and K + were not observed in CE cells transformed by either the Schmidt-Ruppin (SR) or the Bryan (B) strain of Rous sarcoma virus (RSV). Intracellular concentrations of Na + were higher in SR-RSV-transformed CE cells than in B-RSV-transformed cells and uninfected CE cells at all times after plating. In contrast, intracellular concentrations of K + were higher in B-RSV-transformed CE cells than in SR-RSV-transformed cells. Uninfected CE cells incubated in medium containing an elevated concentration of K + (an increase from 5 to 30 m M) exhibited several, but not all, of the transformation parameters expressed by B-RSV-transformed CE cells.