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THE DISTRIBUTION AND NATURE OF COLOUR VISION AMONG THE MAMMALS
  • G. H. Jacobs
  • Biology, Medicine
  • Biological reviews of the Cambridge Philosophical…
  • 1 August 1993
TLDR
This review has evaluated the proposition that relatively few mammalian species have a capacity for colour vision in mammals in the light of recent research on colour vision and its mechanisms in mammals and concluded that the baseline mammalian colour vision is argued to be dichromacy. Expand
Trichromatic colour vision in New World monkeys
TLDR
It is reported that multiple X-chromosome pigment genes and trichromatic colour vision are the norm for one genus of platyrrhine monkey, the howler monkey, Alouatta. Expand
Retinal receptors in rodents maximally sensitive to ultraviolet light
TLDR
It is reported that some rodents have a retinal mechanism that is maximally sensitive to ultraviolet light, which was thought not to exist in the eyes of mammals. Expand
Spectral tuning of pigments underlying red-green color vision.
TLDR
Comparisons of the deduced amino acid sequences suggest that three amino acid substitutions produce the approximately 30-nanometer difference in spectral peaks of the pigments underlying human red-green color vision, and red shifts of specific magnitudes are produced by replacement of nonpolar with hydroxyl-bearing amino acids at each of the three critical positions. Expand
Functional consequences of the relative numbers of L and M cones.
TLDR
This study examines the functional consequences of variation in the relative numbers of L and M cones (L/M cone ratio) for two observers whose ratios were measured by direct imaging and indicates that neural factors play an important role in stabilizing unique yellow against variation inThe L/M cones ratio. Expand
Comparative Color Vision
Variations of colour vision in a New World primate can be explained by polymorphism of retinal photopigments
TLDR
Good quantitative agreement was found when the microspectrophoto-metrically measured absorbance spectra were used to predict the behavioural sensitivity of individual animals to long wavelengths and suggests that the behavioural variation arises from variation in the retinal photopigments. Expand
Evolution of colour vision in mammals
  • G. H. Jacobs
  • Biology, Medicine
  • Philosophical Transactions of the Royal Society B…
  • 12 October 2009
TLDR
The evolution of colour vision among the mammals is viewed, viewing that process in the context of relevant biological mechanisms, of variations in mammalian colour vision, and of the utility of color vision. Expand
Mutations in S-cone pigment genes and the absence of colour vision in two species of nocturnal primate
TLDR
Examination of the nucleotide sequences of the S-cone pigment genes reveals that each species has deleterious mutational changes: in comparison to the sequence for the corresponding region of the human gene, exon 4 of the bushbaby S- cone pigment gene has a two nucleotide deletion and a single nucleotide insertion that produces a frame shift and results in the introduction of a stop codon. Expand
Analysis of response patterns of LGN cells.
TLDR
Comparisons with psychophysical data indicated that nonopponent cells transmit brightness information; opponent cells, however, carry information about color, the hue of a light being determined by the relative responses of the four types. Expand
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