EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Spectral relations of cone pigments in goldfish


Journal of General Physiology 68(1): 65-80
Spectral relations of cone pigments in goldfish
Dark-adapted retinal cones of goldfish were measured microspectrophotometrically. The three types of spectra so obtained were subjected to a new method of data analysis. In order of types blue (B), green (G), and red (R), the best estimates for lambdamax were 453, 533, and 620 nm; for main band half width, 6,700, 4,700, and 3,900 cm-1. The extinction spectra of 11-cis 3,4-dehydroretinal and those of the three goldfish pigments were progressively fitted with Gaussian curves starting at the low-energy end of their spectra. The sum of the oscillator strengths of the first three Gaussian components throughout the four spectra were found to have nearly equal magnitudes. Functional relationships that connect the Gaussian parameters were obtained by curve-fitting, enabling partial absorption spectra to be generated for any lambdamax. The generated curves predicted the half width and peak extinction of porphyropsin-type absorption spectra more accurately than previously existing nomograms or hypothesis. The epsilonmax values thus obtained were 28,500, 32,000, and 35,700 liter/mole cm for the B-, G-, and R-type goldfish pigments; these were found to be consistent with the experimental determinations of +/- 10% estimated accuracy.


Accession: 006459824

PMID: 948000

DOI: 10.1085/jgp.68.1.65



Related references

Rod and cone visual pigments in the goldfish. Vision Research 21(6): 943-946, 1981

Rod and cone visual pigments in the goldfish carassius auratus. Investigative Ophthalmology & Visual Science: 182-183, 1980

Expression of rod and cone visual pigments in goldfish and zebrafish: a rhodopsin-like gene is expressed in cones. Neuron 10(6): 1161-1174, 1993

Visual pigments of goldfish cones spectral properties and dichroism. Journal of General Physiology 63(3): 279-304, 1974

Visual pigments of goldfish cones. Spectral properties and dichroism. Journal of General Physiology 63(3): 279-304, 1974

Spectral tuning of deep red cone pigments. Biochemistry 47(16): 4614-4620, 2008

Spectral tuning of rhodopsin and visual cone pigments. Journal of the American Chemical Society 136(7): 2723-2726, 2014

Studies on spectral sensitivity curves of the cone pigments. Nippon Ganka Gakkai Zasshi 82(9): 627-634, 1978

On spectral sensitivity in the goldfish. Evidence for neural interactions between different "cone mechanisms". Vision Research 24(10): 1223-1231, 1984

Spectral sensitivity in the goldfish evidence for neural interactions between different cone mechanisms. Vision Research 24(10): 1223-1232, 1984