Coexpressed Opsins


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Two different (with different peak wavelengths) that occupy the same .

This is one reason that the number of in an organism’s genome, or the number of expressed are not perfect indicators of the ‘depth’ of color vision.

For example, a was briefly considered to have the most and therefore the ‘richest’ color vision. However, it was later determined that many of those are co-expressed in the same , and so don’t provide independent, comparable signals that can be used to determine color.