Stability and exchange rate of MBPeng monomers and dimers in solution. (A) Analytical SEC on MBPeng-KFLFAK obtained following cell lysis by sonication or chemical lysis. (B) Central fractions of the monomeric or dimeric peaks from (A) were incubated for one week at different temperatures and then subjected to analytical SEC. (C) Thermal stability assay (DSF) showing the first derivative of melting curves. Figures were prepared using GraphPad Prism 6.0 (https://graphpad.com).