Analysis of the effect of heat-treatment on purification of pETTm0548 (recombinant catalytic subunit of TmAHAS) using SDS-PAGE (12.5%). Lane 1, CFE with no heat-treatment; lane 2, CFE, 30 min at 70 °C; lane 3, CFE, 60 min at 70 °C; lane 4, CFE, 90 min at 70 °C; lane 5, CFE with no heat-treatment; lane 6, CFE, 30 min at 80 °C; lane 7, CFE, 60 min at 80 °C; lane 8, CFE, 90 min at 80 °C; M: BLUeye pre-stained protein ladder (Froggibio, ON, Canada), the black arrow indicate the position of the recombinant protein band (calculated molecular weight 65.5 kDa); approximately 30 µg of the protein loaded per lane.