Erratum to: Microbial Cell Factories 2012, 11:42 DOI 10.1186/1475-2859-11-42

Recently, we have noticed an accidental error existing in this article [1]. In the section Materials and Methods “Construction of Plasmids”, we mistakenly described that “the gene cluster hpaBC was amplified from E. coli MG1655 genome”. This information should be corrected as “the gene cluster hpaBC was amplified from E. coli BL21 (DE3) genome”. This change will in no manner affect the outcome/interpretation of the experiments as described in the original publication and will not affect the merit of this work. The authors apologize for any inconvenience caused thereof.