Table 3.

COG function classes identified in the jejunal microbiome of ducks.

COG_class	Description	CJ1	HJ2	P value
R	General function prediction only	11.72 ± 0.24	11.53 ± 0.26	0.127
S	Function unknown	8.36 ± 0.23	7.96 ± 0.42	0.269
E	Amino acid transport and metabolism	8.18 ± 0.50	7.93 ± 0.39	0.503
K	Transcription	7.71 ± 0.28	7.77 ± 0.40	0.164
G	Carbohydrate transport and metabolism	7.53 ± 0.69	7.99 ± 0.76	0.359
J	Translation, ribosomal structure, and biogenesis	6.70 ± 0.73	6.72 ± 0.73	0.818
L	Replication, recombination, and repair	6.16 ± 0.69	6.44 ± 0.51	0.299
M	Cell wall/membrane/envelope biogenesis	5.93 ± 0.28	6.25 ± 0.12	0.327
C	Energy production and conversion	5.33 ± 0.23	5.23 ± 0.26	0.243
T	Signal transduction mechanisms	5.31 ± 0.86	5.43 ± 0.54	0.979
P	Inorganic ion transport and metabolism	5.12 ± 0.18	4.90 ± 0.17	0.764
H	Coenzyme transport and metabolism	4.16 ± 0.16	4.00 ± 0.34	0.442
O	Posttranslational modification, protein turnover, chaperones	3.60 ± 0.15	3.48 ± 0.24	0.037
F	Nucleotide transport and metabolism	2.99 ± 0.38	3.04 ± 0.34	0.626
I	Lipid transport and metabolism	2.96 ± 0.35	2.76 ± 0.16	0.299
V	Defense mechanisms	2.03 ± 0.28	2.38 ± 0.23	0.053
U	Intracellular trafficking, secretion, and vesicular transport	2.03 ± 0.27	2.03 ± 0.09	0.118
Q	Secondary metabolites biosynthesis, transport, and catabolism	1.62 ± 0.28	1.39 ± 0.19	0.220
N	Cell motility	1.3 ± 0.63	1.44 ± 0.28	0.074
D	Cell cycle control, cell division, chromosome partitioning	1.21 ± 0.10	1.30 ± 0.11	0.771
B	Chromatin structure and dynamics	0.03 ± 0.01	0.02 ± 0.01	0.945
A	RNA processing and modification	0.01 ± 0.01	0.01 ± 0.00	0.041
Z	Cytoskeleton	0.01 ± 0.00	0.01 ± 0.00	0.862
W	Extracellular structures	0.00 ± 0.00	0.00 ± 0.00	0.200

¹CJ: jejunal content samples from the control ducks.

²HJ: jejunal content samples from the heat-treated ducks.