Table 2.

Gene ontology overrepresentation of the 39 invariant genes.

Primary function	GOID	Gene ontology terms	P value
Cell division	GO:0071139	Cell cycle	5.51E − 61
	GO:0006276	Plasmid recombination	6.01E − 31
	GO:0016051	Cell division	2.90E − 16
	GO:0006432	Plasmid maintenance	2.90E − 16
	GO:0042594	Response to starvation	3.39E − 11
	GO:0007049	Chromosome segregation	6.61E − 09
	GO:0017038	Resolution of recombinant intermediates	1.21E − 08
	GO:0006004	Guanosine tetraphosphate metabolic process	1.21E − 08
	GO:0042953	Lysogeny	4.20E − 07
	GO:0051301	Diaminopimelate biosynthetic process	3.50E − 06
Carbohydrate metabolism	GO:0030259	Carbohydrate biosynthetic process	2.34E − 31
	GO:0006749	Lipid glycosylation	2.34E − 31
	GO:0007059	Fucose metabolic process	8.08E − 13
Protein synthesis	GO:0030069	Phenylalanyl-tRNA aminoacylation	2.34E − 31
	GO:0016075	RNA catabolic process	2.34E − 31
	GO:0015969	Lipoprotein transport	2.90E − 16
	GO:0019277	Phenylalanyl-tRNA aminoacylation	2.90E − 16
	GO:0042150	Protein import	3.39E − 11
	GO:0006396	RNA processing	2.48E − 09
	GO:0033014	Tetrapyrrole biosynthetic process	1.21E − 08
	GO:0019877	Glutathione metabolic process	4.20E − 07