作者: EDWIN W. ABRAHAMSON , ROGER S. FAGER
DOI: 10.1016/B978-0-12-152505-7.50012-0
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摘要: Publisher Summary This chapter discusses the chemistry of vertebrate and invertebrate visual photoreceptors. Vision is unique among sensory processes in that molecules cell membranes actually receive primary stimulus, is, absorption visible light, have very singular spectral properties. Being long-chain conjugated polyenes high extinction polarizability, their spectra serve as sensitive probes microenvironments. Visual photoreceptor constituent pigments can be obtained conveniently large quantity purity. ready biochemical accessibility sensitivity, specificity, comparative ease mensuration clearly make pigment an ideal prototype system not only for study but membrane general. cells animal kingdom are two basic types, ciliary vertebrates allied phyla, rhabdomeric phyla