3.6.1.22 - 3.6.1.22 expressed in Escherichia coli 3.6.1.22 expressed in Escherichia coli BL21 (DE3) cells 3.6.1.22 expressed in Escherichia coli BL21 (DE3) cells and in Mycobacterium smegmatis strain mc2155 3.6.1.22 gene NUDX19, sequence comparisons and phylogenetic analysis