Mtb-cyt-bd oxidase-IN-2 is an inhibitor of Mycobacterium tuberculosis cytochrome bd oxidase ( Mtb cyt-bd oxidase ) with an IC 50 value of 0.67 μM. Mtb-cyt-bd oxidase-IN-2 inhibits the growth of Mycobacterium tuberculosis with a MIC value of 256 μM. Mtb-cyt-bd oxidase-IN-2 can be used for the research of infection.