FIG. 5.
CGP degradation by concentrated supernatant samples from cultures of P. alcaligenes DIP1 after induction. CGP degradation was determined photometrically and was used as an indicator of the CphEal concentration. (A) Samples from cultures induced with different potential inductors, indicated on the x axis, at a concentration of 0.25 g liter−1. (B) Samples from cultures induced with different concentrations of CGP. (C) Samples from cultures induced with different concentrations of CGP dipeptides. (D) Samples from cultures induced with different concentrations of aspartate. CGP, cyanophycin; Arg-Asp, α-arginine-aspartate; Lys-Asp, α-lysine-aspartate; Orn-Asp, α-ornithine-aspartate; CGP-Dip, CGP dipeptides; poly-Asp, poly(aspartic acid); poly-Lys, poly(lysine); Asp, l-aspartate; Lys, l-lysine; Cit, l-citrulline; Orn, l-ornithine; Arg, l-arginine; control, noninduced culture.