In the presence of Mn , MntR represses the expression of mntH , through direct binding of specific sites within the promoter regions of these genes .
MntR , plays a major role in regulating mntH expression in Bacillus subtilis .
Expression of Salmonella mntH gene is regulated by both MntR-dependent and-independent mechanisms .
The Fur-and MntR-controlled mntH gene , also involved in Mn2 + and Fe2 + uptake ( with a preference for Mn2 + ) , was also induced but in lesser extent ( up to 2.1-fold at 45 min ) .