What is the photopigment associated with a L cone?

The photopigment associated with an L cone is chlorolabe. This pigment is responsible for the sensitivity to long wavelengths of light, which correlates to the perception of red colors in the visual spectrum. L cones are also known as long-wavelength cones and play a pivotal role in color vision, particularly in the detection of longer wavelengths that correspond to reds and yellows.

The other pigments mentioned are linked to other types of cones. Erythrolabe is specifically associated with M cones, which correspond to medium-wavelength light sensitivity (greens). Cyanolabe is linked to S cones, which respond to short wavelengths of light (blues). Melanolabe does not correspond to any standard classification of photopigments in human vision as recognized in the context of photoreceptor types.

Thus, the identification of chlorolabe as the correct photopigment associated with L cones highlights the distinct and crucial role that this particular pigment plays in the overarching color perception fundamental to human vision.