title: The serine/threonine kinase PknB of Mycobacterium tuberculosis phosphorylates PBPA, a penicillin-binding protein required for cell division.
abstract: The authors would like to retract the article as the published versions of Figs. 3b, 6a, b, d, 7a, b(lower panel) were modified prior to publication. The authors would like to apologise to thereaders, reviewers and editors of Microbiology for this error.