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
Table 1: Proportions and ranks of three COGs by different methods.