Differential GroEL synthesis in four B. bacilliformis strains. A) Coomassie blue-stained SDS-PAGE analysis of the total protein profiles for strains JB584, LSS001, LSS100, and LSS200 (lanes 1–4, respectively), and B) the corresponding immunoblot developed with rabbit anti-B. bacilliformis GroEL antiserum. All lanes contain 30 μg total protein. GroEL is indicated by a double arrow. Molecular mass values from protein standards are given to the left in kDa.