C3 and obesity due to melanocortin 4 receptor deficiency: However, these 30 proteins with different Uniprot accession numbers, correspond to 12 different proteins, with nine proteins showing higher abundance in cats with obesity, including Ig-like domain-containing protein, Alpha-2-HS-glycoprotein, Complement C8 gamma chain, Antithrombin-III, Serpin family A member 1, Complement factor H, C3-beta-c, Albumin, and C4b-binding protein alpha chain, and three proteins that presented lower abundance in obesity, namely Alpha-1-B glycoprotein, Solute carrier family 12 member 4, and Fibronectin.