Fig. 6

Cell cycle distribution (a + c) and fraction of actively proliferating cells (b + d) in AT1 and Walker-256 cells in vitro (a + b) and AT1 and Walker-256 tumors in vivo (c + d) after 24 h under acidotic or control conditions. n = 6–37; (*) p < 0.05, (**) p < 0.01 acidosis vs. control