2.6.1.9 - 2.6.1.9 expression in Mycobacterium smegmatis 2.6.1.9 expression of wild-type and selenomethionine-labeled enzyme in Escherichia coli strain BL21(DE3) and B834(DE3), respectively 2.6.1.9 HisC2 is overexpressed in Mycobacterium smegmatis