Mitochondrially encoded cytochrome c oxidase II pseudogene 21 (MTCO2P21)

MTCO2P21 (mitochondrially encoded cytochrome c oxidase II pseudogene 21) is classified as a pseudogene, which means it is a genomic DNA sequence similar to a normal gene but non-functional; it does not encode a protein or participate in cellular signaling, transport, or metabolic processes. This pseudogene has been mapped to human chromosome 1p22.1 and lacks exons, confirming its non-coding status. There are no known biological functions, disease associations, or roles in pharmacology or as a therapeutic target. MTCO2P21 should not be confused with the functional *MT-CO2* gene, which encodes cytochrome c oxidase subunit II, a core component of mitochondrial respiration. As a pseudogene, MTCO2P21 does not have reported disease associations, interacting drugs, or a mechanism of action. *MTCO2P21* is not the same as functional CODING gene *MT-CO2*—their symbols are similar, but only the latter participates in respiratory chain biology. The designation as a "pseudogene" explains the absence of biological, pathological, or pharmacological data. No evidence suggests that MTCO2P21 is misnamed or has erroneous sequence data; it is a legitimate, though non-functional, gene annotation.

Other names

MTCO2P21MT-CO2 pseudogene 21