Iodopsin
Iodopsin (dikenal juga sebagai Opsin kerucut) adalah protein sel fotoreseptor yang terdapat di sel kerucut pada retina, yang merupakan dasar dari penglihatan warna. Iodopsin memiliki analog yang sangat mirip dengan rhodopsin, yang digunakan untuk penglihatan malam. Iodopsin mengandung protein yang disebut photopsin.
Jenis
Opsin yang berbeda memiliki sedikit perbedaan pada asam amino, dan menyerap cahaya dengan panjang cahaya yang berbeda.
| Jenis | Nama | Rentang | Panjang gelombang[1][2] |
|---|---|---|---|
| S (OPN1SW) - "tritan", "cyanolabe" | β | 400–500 nm | 420–440 nm |
| M (OPN1MW) - "deutan", "chlorolabe" | γ | 450–630 nm | 534–545 nm |
| L (OPN1LW) - "protan", "erythrolabe" | ρ | 500–700 nm | 564–580 nm |
Referensi
- ^ Wyszecki, Günther (1982). Color Science: Concepts and Methods, Quantitative Data and Formulae (Edisi 2nd). New York: Wiley Series in Pure and Applied Optics. ISBN 0-471-02106-7. ;
- ^ R. W. G. Hunt (2004). The Reproduction of Colour (Edisi 6th). Chichester UK: Wiley–IS&T Series in Imaging Science and Technology. hlm. 11–12. ISBN 0-470-02425-9.
Pranala luar
- Rhodopsin and the eye, an excellent summary with pictures.
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