p50 (mmHg) and 2,3 DPG Concentration μgmol gHb−1) for RBCs stored in CPDA-1, AS-1, and SOLX (N = 6). (A). p50, partial pressure of oxygen for 50% oxygen saturation of hemoglobin, tracked over 42 days for blood stored CPDA-1, AS-1, and SOLX. (B). Concentration of 2,3 DPG per gram of hemoglobin in blood tracked over 42 days for blood stored with CPDA-1, AS-1, and SOLX. Data was fit with an exponential decay, and time constants were found to be: CPDA-1 (τ = 12.4), SOLX (τ = 18.9), and AS-1 (τ = 20.0).