Type of opsin present in retinal rods, which coalesces with 11-cis retinal to produce rhodopsin, the photopigment known as visual purple and having sensitivity to photons within the rod.

SCOTOPSIN: "Scotopsin is integral to color vision as it helps form rhodopsin, known as visual purple."
Cite this page: N., Pam M.S., "SCOTOPSIN," in, April 28, 2013, (accessed September 25, 2021).