Table 2. Search parameters.

Item	Values
Main search ppm	6
Missed cleavage	2
MS/MS tolerance ppm	20
De-isotopic	True
Enzyme	Trypsin
Database	Felinae
Fixed modification	Carbamidomethyl (C)
Variable modification	Oxidation (M), Acetyl (Protein N-term)
Decoy database pattern	Reverse
LFQ	True
LFQ min ratio count	1
Match between runs	2 min

The results filtering parameter was a peptide FDR ≤ 0.01.

LFQ, label-free quantification; FDR, false discovery rate.