Consistent characteristics of p239 VLPs in Samples a, c and c0) undergoing different treatments. (A) HPSEC showed consistent antigen particle size (nearly identical retention time for Samples a, c and c0). The molecular weight of p239 and E2 (dimer) were approximately 3,162 kDa and 147 kDa, respectively.7 Dimer, E2, in the assay serves as a control for elution pattern for a dimeric molecule, as opposed to a particulate antigen.28 (B) AUC profiles revealed similar coefficients (21.8 s – 20.5 s) for p239 in 3 different samples. (C) Analogous pI (5.80 – 5.83) values of native and desorbed p239 VLPs were demonstrated by iCIEF.