Western blot analysis of capsule production by capsule-complemented strain B. pseudomallei SZ210(pSZ219). Bacteria were reacted with proteinase K, subjected to SDS-PAGE, electroblotted, and reacted with monoclonal antiserum raised to B. pseudomallei CPS. Lane M, benchmark prestained protein molecular mass standards (Invitrogen Life Technologies); lane 1, B. pseudomallei 1026b; lane 2, B. thailandensis E264; lane 3, B. pseudomallei SR1015; lane 4, B. pseudomallei SZ210; lane 5, blank; lane 6, B. pseudomallei SZ210(pSZ219). The apparent molecular masses of the prestained proteins are indicated.