Figure 3. DM does not stabilize MHC II by preventing aggregation.
(A) Representative elution profiles of freshly purified DR1 monomer and DR1 loaded with HA (pre-incubation). The elution position and molecular mass of protein standards (unit: kilo Dalton) were shown above traces, with void volume Vo and total included volume VT indicated. Stabilization of (B) non peptide-loaded DR1 or (C) DR1 loaded with a weakly binding peptide W1A by DM or peptides was monitored by gel filtration (post-incubation). Black arrow on each plot indicated the aggregation of DR1. These traces are representative of at least four independent experiments.