What Makes Red Visual Pigments Red? A Resonance Raman Microprobe Study of Retinal Chromophore Structure in Iodopsin

Biochemistry ◽  
1994 ◽  
Vol 33 (8) ◽  
pp. 2151-2160 ◽  
Author(s):  
Steven W. Lin ◽  
Yasushi Imamoto ◽  
Yoshitaka Fukada ◽  
Yoshinori Shichida ◽  
Toru Yoshizawa ◽  
...  
Keyword(s):  
Resonance Raman ◽  
Visual Pigments ◽  
Raman Microprobe ◽  
Retinal Chromophore

scholarly journals Why are blue visual pigments blue? A resonance Raman microprobe study.

1989 ◽  
Vol 86 (5) ◽  
pp. 1515-1518 ◽  
Author(s):  
G. R. Loppnow ◽  
B. A. Barry ◽  
R. A. Mathies
Keyword(s):  
Resonance Raman ◽  
Visual Pigments ◽  
Raman Microprobe

scholarly journals Structure of the retinal chromophore in sensory rhodopsin I from resonance Raman spectroscopy

1989 ◽  
Vol 264 (31) ◽  
pp. 18280-18283
Author(s):  
S P Fodor ◽  
R Gebhard ◽  
J Lugtenburg ◽  
R A Bogomolni ◽  
R A Mathies
Keyword(s):  
Raman Spectroscopy ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Sensory Rhodopsin ◽  
Retinal Chromophore ◽  
Sensory Rhodopsin I

Resonance Raman Studies of Visual Pigments

1977 ◽  
Vol 6 (1) ◽  
pp. 33-55 ◽  
Author(s):  
R Callender ◽  
B Honig
Keyword(s):  
Resonance Raman ◽  
Visual Pigments

scholarly journals Resonance Raman studies of the primary photochemical event in visual pigments

1980 ◽  
Vol 29 (1) ◽  
pp. 79-94 ◽  
Author(s):  
B. Aton ◽  
A.G. Doukas ◽  
D. Narva ◽  
R.H. Callender ◽  
U. Dinur ◽  
...  
Keyword(s):  
Resonance Raman ◽  
Visual Pigments

scholarly journals Multiple visual pigments in a photoreceptor of the salamander retina.

1996 ◽  
Vol 108 (1) ◽  
pp. 27-34 ◽  
Author(s):  
C L Makino ◽  
R L Dodd
Keyword(s):  
Absorption Spectra ◽  
Visual Pigment ◽  
Photoreceptor Cells ◽  
Visual Pigments ◽  
Wavelength Band ◽  
Absorption Bands ◽  
Maximal Sensitivity ◽  
Retinal Chromophore ◽  
Wavelength Discrimination ◽  
Pigment Absorption

Although a given retina typically contains several visual pigments, each formed from a retinal chromophore bound to a specific opsin protein, single photoreceptor cells have been thought to express only one type of opsin. This design maximizes a cell's sensitivity to a particular wavelength band and facilitates wavelength discrimination in retinas that process color. We report electrophysiological evidence that the ultraviolet-sensitive cone of salamander violates this rule. This cell contains three different functional opsins. The three opsins could combine with the two different chromophores present in salamander retina to form six visual pigments. Whereas rods and other cones of salamander use both chromophores, they appear to express only one type of opsin per cell. In visual pigment absorption spectra, the bandwidth at half-maximal sensitivity increases as the pigment's wavelength maximum decreases. However, the bandwidth of the UV-absorbing pigment deviates from this trend; it is narrow like that of a red-absorbing pigment. In addition, the UV-absorbing pigment has a high apparent photosensitivity when compared with that of red- and blue-absorbing pigments and rhodopsin. These properties suggest that the mechanisms responsible for spectrally tuning visual pigments separate two absorption bands as the wavelength of maximal sensitivity shifts from UV to long wavelengths.

Resonance Raman spectroscopy of squid and bovine visual pigments: the primary photochemistry in visual transduction

Biochemistry ◽  
1978 ◽  
Vol 17 (22) ◽  
pp. 4712-4722 ◽  
Author(s):  
Mark Sulkes ◽  
Aaron Lewis ◽  
Michael A. Marcus
Keyword(s):  
Raman Spectroscopy ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Visual Pigments ◽  
Visual Transduction ◽  
Primary Photochemistry

Resonance Raman Studies of Visual Pigments

1979 ◽  
pp. 391-402
Author(s):  
Robert Callender
Keyword(s):  
Resonance Raman ◽  
Visual Pigments
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