Additional file 4 of Identification of the methionine transporter MetQ in Streptococcus suis and its contribution to virulence and biofilm formation

Additional file 4. Production of recombinant MetQ. (A) SDS-PAGE assays showing whole cell lysates of BL21, BL21 carrying p16b-MetQ (BL21-pMetQ) grown in the presence or absence of IPTG and purified recombinant MetQ (rMetQ). (B) Western blot analysis of whole cell lysates from BL21, BL21-pMetQ grown in the presence or absence of IPTG and rMetQ using antiserum directed against a Histidine - tag. The position of rMetQ is indicated. Std (Standard Molecular weight).