sentences:  Other mutations make the bacterium resistant to other drugs.For example, there are many mutations that confer resistance to isoniazid (INH), including in the genes "katG", "inhA", "ahpC" and others.Amino acid replacements in the NADH binding site of InhA apparently result in INH resistance by preventing the inhibition of mycolic acid biosynthesis, which the bacterium uses in its cell wall.