The FUNDC1 protein, also known as FUN14 domain containing 1, is a mitochondrial protein that plays a critical role in mitochondrial dynamics and cellular respiration. It is involved in various metabolic pathways, including fatty acid metabolism, glycolysis, and oxidative phosphorylation. FUNDC1 is highly expressed in tissues such as the brain and blood, and it is enriched in immune cells like monocytes and neutrophils. The protein is also implicated in immune responses and has been associated with processes such as antigen presentation and the regulation of immune cell functions. Additionally, FUNDC1 has been linked to the detoxification of reactive oxygen species (ROS) and is involved in the metabolism of several vitamins and amino acids.