MDH2 and infection: The steam articles,[27–29] highlighted the key immune-relevant proteins, including small calpain subunit 1, glutathione-S-transferase omega 1, proteasome 26S subunit, 14-kDa apolipoprotein, beta 2-tubulin, cold inducible RNA binding protein, malate dehydrogenase 2 (mitochondrial), and type II keratin, which were found to have significant differential expression in cod skin mucus after natural infection with V. anguillarum.