Figure 5.

The 2.03 signals recorded in the 1960s in: (A) yeast cells; (B(a,b)) control liver preparation and chemically induced rat hepatoma tissue, respectively; (C(a,b)) pigeon and rabbit livers, respectively; (D) chemically induced rat hepatoma at different periods following treatment of rats with hepatocarcinogenic agents. Right panel: The 2.03 signals recorded in 1990 in activated rat macrophages in the presence of L-arginine, L-arginine + N-methyl-L-arginine, in the absence of L-arginine + N-methyl-L-arginine and in the presence of N-methyl-L-arginine alone [22].