In the dark, retinal is in a bent cis shape; light converts it to a straight trans shape, activating the photopigment and separating retinal from opsin.
Dans l'obscurité, le rétinal est en forme cis ; la lumière le convertit en forme trans, activant le photopigment et séparant le rétinal de l'opsine.
| Front | How does light affect the configuration of retinal? |
|---|---|
| Back | 1. In the dark, retinal has bent shape called cis-retinal 2. When the pigment absorbs light, retinal changes to a straight form called trans-retinal; this activates the photopigment (rhodopsin or photopsin) 3. Trans retinal breaks away from the opsoin |
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