| opsin 1 (cone pigments), medium-wave-sensitive 2 | |
|---|---|
| Identifiers | |
| Symbol | OPN1MW2 |
| NCBI gene | 728458 |
| HGNC | 26952 |
| RefSeq | NM_001048181 |
| Other data | |
| Locus | Chr. X q28 |
OPN1MW2 is a duplication of the OPN1MW gene, which encodes the medium wavelength sensitive (MWS) photopsin. The gene duplication is present in about 50% of X-chromosomes, so is present in 50% of males and at least once 75% of females. It caused by the same mechanism that causes congenital red-green color blindness, the most common form of color blindness.
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