Effect of DGP on the t1/2 values for thermal denaturation at 90°C of RdDd, rRdCp, rRdDg, and RdDg. , no additions and anaerobiosis; , no additions and oxygen-saturating conditions; , 200 mM glycerol; , 100 mM KPi; , 100 mM KPi plus 200 mM glycerol; , 100 mM DGP.