Another ` Fur-activated 
These data suggest that Fur activates SPI1 in a manner different from that of Fur activation of sodB .
One such `` Fur-activated 
Known `` Fur-activated 
Fur activates sodB by repressing the expression of ryhB under high-iron conditions .
Thus , Fur positively controls sodB at the posttranscriptional level .
In E. coli , expression of sodB is activated by Fur via repression of the small RNA RyhB .