Purity >95%. MreB is an actin-like protein expressed in bacteria. It determines the rod shape of cells and has critical roles in cell division, chromosome segregation, and cell polarity. MreB perturbing compound A22 is a benzylisothiourea compound that interacts with the ATP binding site of MreB rapidly and reversibly. It blocks normal rod shape formation and inhibits chromosome partitioning in E. coli, inhibiting growth (MIC = 3.1 μg/ml). It interferes with chromosome segregation in C. crescentus by preventing MreB binding to chromosomes. In V. cholerae, A22 prevents the development of normal cell shape and alters nucleoid morphology.