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113
explain the cycle of retinal (four steps)
1 In dark cis retinal - bent shape - fits into opsin
2 Absorbs phoron - isomeriation - change in shape - become straight - trans-retinal
Transretinal sperates form opsin - bleaching
3. In dark retinal isomerase converts
trans to cis-retinal
4. Cis-retinal binds to opsin
Regenerates photopigment
2 Absorbs phoron - isomeriation - change in shape - become straight - trans-retinal
Transretinal sperates form opsin - bleaching
3. In dark retinal isomerase converts
trans to cis-retinal
4. Cis-retinal binds to opsin
Regenerates photopigment