ommatin

Ommatin is a class of natural pigments found in the eyes of many insects and other arthropods. These pigments are responsible for the color of the ommatidia, the individual units that make up a compound eye. Ommatins are structurally related to pteridines and are synthesized through specific biochemical pathways within the insect's body.

The color of ommatins can vary widely, ranging from yellow and orange to red and brown. This variation in color is often due to differences in the chemical structure of the ommatin molecule and the presence of other pigments or structural components within the ommatidium. The specific color of the ommatin can play a role in the insect's vision, influencing its ability to detect certain wavelengths of light and potentially aiding in camouflage or mate recognition.

Research into ommatins has provided insights into the evolution of vision and the complex biochemistry of pigmentation in arthropods. Understanding the synthesis and function of ommatins contributes to our broader knowledge of natural pigments and their biological roles.