6.2.1.49 expressed in Escherichia coli and Mycobacterium smegmatis 740601 6.2.1.49 expressed in Escherichia coli BL21(DE3) cells 739802 6.2.1.49 expressed in Escherichia coli K207-3 cells 740948 6.2.1.49 expressed in Escherichia coli strain K207-3 740948