3.5 Functional enrichment of PSGs
GO enrichment analyses showed that the candidate PSGs were significantly
overrepresented and enriched into GO categories such as: metabolic
process (GO: 0008152), protein metabolic process (GO: 0019538),
single-organism process (GO: 0044699) (Table 5). These categories
appeared to be biologically relevant to energy metabolism.
By comparing the GO annotations enriched in different
specieslow, we found some GO terms enriched more PSGs in
each species. For the PSGs in R. siamensis , we listed six
over-represented GO categories, and some of them related to catalytic
activity and metabolic processes. For R. episcopus , three
significantly enriched GO categories in terms of single-organism
process, catalytic activity, and single-organism process enriched more
PSGs. We found three GO categories enriched more PSGs compared with
other categories in R. marshalli . The PSGs identified in R.
rex were mainly enriched in GO terms of molecular function,
single-organism process, catalytic activity, and protein metabolic
process.