| 
      
        |  | PLSA | Zhang’s | E 1e-3 | E 1e-5 |  
        | prop. | rank | prop. | rank | prop. | rank | prop. | rank |  
        | COG1028: Dehydrogenases with different specificities | 0.0062 | 1 | 0.01 | 3 | 0.0059 | 3 | 0.0049 | 13 |  
        | COG0642: Signal transduction histidine kinase | 0.0022 | 51 | 0.0031 | 22 | 0.002 | 86 | 0.0018 | 131 |  
        | COG0477: Permeases of the major facilitator superfamily | 0 | NA | 0 | NA | 0.0015 | 161 | 0.0011 | 276 |  |