Melanopsin (Opn4) utilizes Galpha(i) and Gbetagamma as major signal transducers.

Kankanamge D, Ratnayake K, Samaradivakara S, Karunarathne A
J Cell Sci. 2018 Jun 5;131(11):jcs212910. doi: 10.1242/jcs.212910. PubMed Article

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