Table 1. Opsin expression in human skin

Year Cell type Photosensitive protein
2009 Keratinocytes OPN2, OPN1-LW, OPN1-MW
2011 Melanocytes OPN2
2013 Keratinocytes OPN2
2015 Keratinocytes, Melanocytes OPN1-SW, OPN2, OPN3, OPN5
2017 Keratinocytes RRH
2017 Hair follicle stem cells OPN2 and OPN3
2018 Melanocytes OPN3
2018 Keratinocytes, Dermal fibroblasts OPN3
2019 Melanocytes OPN3
2019 Dermal fibroblasts OPN1-5; focus on OPN3
2020 Melanocytes OPN3