Intracellular Absorption Difference Spectrum of Limulus Extra-Ocular Photolabile Pigment

Abstract

Microspectrophotometric measurements on single cell bodies located on the surface of the"lateral olfactory nerve" of Limulus polyphemus show they contain a photolabile pigment with a absorption-difference spectrum similar in shape to that of most other visual pigments and with a maximum absorption at 529 ± 5 nanometers.