7441fa2e_sis_system___Life_Technologies__Problem
[Reason] Scaffold protein is detected [Solution] The scaffold protein from the MembraneMax™ Reagent will migrate as a 28 kDa band on an SDS-PAGE gel. [Problem] 
Multiple bands observed on the polyacrylamide gel
MembraneMax™ Protein Expression Kits | for expression of recombinant membrane proteins in a cell-free protein synthesis system | Life Technologies