Table 1. The enrichment of Gene Ontology (GO) categories for the frog skin and tryptone treatments.

	GO gene set ID	Gene set size	GO gene set description	Normalized enrichment score	p-value
Biological Process
	frog skin
	GO:0006508	207	proteolysis	1.21	0.020
	GO:0006032	11	chitin catabolic process	1.38	0.059
	tryptone
	GO:0045454	14	cell redox homeostasis	−1.40	0.030
Molecular Function
	frog skin
	GO:0004190	77	aspartic-type endopeptidase activity	1.16	0.007
	GO:0004568	11	chitinase activity	1.38	0.059
	tryptone
	GO:0004175	11	endopeptidase activity	−1.34	0.025
	GO:0004298	11	threonine-type endopeptidase activity	−1.36	0.049
	GO:0008415	16	acyltransferase activity	−1.30	0.049
Cellular Component
	frog skin
	none
	tryptone
	GO:0005839	11	proteasome core complex	−1.36	0.049