The eggNOG online database http://eggnog5.embl.de/#/app/home (accessed on 30 June 2023) and KEGG-mapper online tool http://www.kegg.jp/kegg/mapper.html (accessed on 30 June 2023) were utilized to perform Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses of the DEPs identified between HF and LF spermatozoa. Pathways with a corrected p-value < 0.05 were considered significantly enriched. Protein–protein interactions (PPIs) were investigated by searching all DEPs database accession or sequence against the STRING (version 11.5) database https://cn.string-db.org/ (accessed on 30 June 2023).
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