Table 3.

Classification of downregulated genes related to saccharometabolism.

Functional classification	Number of variable genes	Annotation of key genes
Glucose metabolism-related enzymes	13	glgC, glpK, malM, uxaC, endo-beta-N-acetylglucosaminidase
Galactose metabolism-related enzymes	7	galK, galt, galM, beta-galactosidase, alpha-galactosidase
Mannose metabolism-related enzymes	3	N-acetylmannosamine 6-P epimerase, putative alpha-1,2-mannosidase
Other sugar metabolism-related enzymes	5	gtfA, beta-fructosidases, beta-hexosamidase, sugar kinases
PTS system	9	PTS-EIIB; PTS-EIID; PTS-EIIC
ABC-type sugar transport system	13	msmE, malX, malC, ABC-type sugar transport systems, permease components