Research Topics
| J K BowmakerSummaryAffiliation: University College London Country: UK Publications
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Detail Information
Publications
Developmental dynamics of cone photoreceptors in the eelPhillippa B Cottrill
UCL Institute of Ophthalmology, 11 43 Bath Street, London, EC1V 9EL, UK
BMC Dev Biol 9:71. 2009..Eels are known to change the expression of their rod opsins as they mature, but might they also change the expression of their cone opsins?..
The cone photoreceptors and visual pigments of chameleonsJames K Bowmaker
Division of Visual Science, Institute of Ophthalmology, University College London, UK
J Comp Physiol A Neuroethol Sens Neural Behav Physiol 191:925-32. 2005..The latter two classes were sparsely distributed. The transmission of the lens and cornea of C. dilepis was measured and found to be transparent throughout the visible and near ultraviolet, with a cut off at about 350 nm...- Evolution of vertebrate visual pigmentsJames K Bowmaker
Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
Curr Biol 16:R484-9. 2006 
Eel visual pigments revisited: the fate of retinal cones during metamorphosisJames K Bowmaker
UCL Institute of Ophthalmology, University College London, London, United Kingdom
Vis Neurosci 25:249-55. 2008..During metamorphosis, the cones are almost completely lost...- Pineal organs of deep-sea fish: photopigments and structureJames K Bowmaker
Division of Visual Science, Institute of Ophthalmology, University College London, EC1V 9EL, UK
J Exp Biol 207:2379-87. 2004..In one species of hatchet fish, Argyropelecus affinis, two spectral classes of pinealocyte were identified, both spectrally distinct from the retinal rod photopigment... - Evolution of vertebrate visual pigmentsJames K Bowmaker
Department of Visual Science, UCL Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
Vision Res 48:2022-41. 2008..Gene duplication within the cone classes, especially in teleosts, has resulted in multiple opsins being available, both temporally and spatially, during development... - Evolution of colour vision in vertebratesJ K Bowmaker
Department of Visual Science, University College London, UK
Eye (Lond) 12:541-7. 1998.... - Spectral tuning and evolution of short wave-sensitive cone pigments in cottoid fish from Lake BaikalJill A Cowing
Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
Biochemistry 41:6019-25. 2002..The underlying adaptive significance of these substitutions in terms of spectral tuning and signal-to-noise ratio is discussed... - Molecular evolution of trichromacy in primatesD M Hunt
Department of Molecular Genetics, Institute of Ophthalmology, University College London, UK
Vision Res 38:3299-306. 1998.... - Mix and match color vision: tuning spectral sensitivity by differential opsin gene expression in Lake Malawi cichlidsJuliet W L Parry
Institute of Ophthalmology, University College London, London EC1V 9EL, United Kingdom
Curr Biol 15:1734-9. 2005..However, African cichlids determine their spectral sensitivity by differential expression of primarily only three of the seven available cone opsin genes. Phylogenetic analysis suggests that all percomorph fish have similar potential... - The molecular mechanism for the spectral shifts between vertebrate ultraviolet- and violet-sensitive cone visual pigmentsJill A Cowing
Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, U.K
Biochem J 367:129-35. 2002..The replacement of Phe with polar Tyr at site 86 is consistent with the stabilization of Schiff-base protonation in VS pigments and the absence of protonation in UVS pigments... - The molecular evolution of avian ultraviolet- and violet-sensitive visual pigmentsLivia S Carvalho
UCL Institute of Ophthalmology, London, UK
Mol Biol Evol 24:1843-52. 2007..From available data on avian SWS1 pigments, it would appear that UVS pigments have evolved on at least 5 separate occasions and utilize 2 different mechanisms for the short-wave shift... - A novel amino acid substitution is responsible for spectral tuning in a rodent violet-sensitive visual pigmentJuliet W L Parry
Institute of Ophthalmology, University College London, 11 43 Bath Street, London EC1V 9EL, UK
Biochemistry 43:8014-20. 2004..The convergent evolution of this mammalian VS pigment provides insight into the mechanism of tuning between the violet and UV... - The molecular basis for spectral tuning of rod visual pigments in deep-sea fishD M Hunt
Department of Molecular Genetics, University College London, Bath Street, London, EC1V 9EL, UK
J Exp Biol 204:3333-44. 2001..A total of 27 changes is required to generate the pattern of substitutions seen in the different species, with many sites undergoing multiple changes... - The molecular basis for UV vision in birds: spectral characteristics, cDNA sequence and retinal localization of the UV-sensitive visual pigment of the budgerigar (Melopsittacus undulatus)S E Wilkie
Department of Molecular Genetics, Institute of Ophthalmology, University College London, 11 43 Bath Street, London EC1V 9EL, U K
Biochem J 330:541-7. 1998..In situ hybridization of this sequence to budgerigar retinas selectively labelled a sub-set of UV cones, representing approx. 9% of the total cone population, that are distributed in a semi-regular pattern across the entire retina... - Evolution of the cichlid visual palette through ontogenetic subfunctionalization of the opsin gene arraysTyrone C Spady
Hubbard Center for Genome Studies and Department of Zoology, University of New Hampshire, London, UK
Mol Biol Evol 23:1538-47. 2006..The distinct peak absorbances of these preserved opsin genes provide a palette from which selection creates the diverse visual sensitivities found among the cichlid species of the lacustrine adaptive radiations... - Adaptations to an extreme environment: retinal organisation and spectral properties of photoreceptors in Antarctic notothenioid fishMarie A Pointer
Institute of Ophthalmology, University College London, 11-43 Bath Street, London, EC1V 9EL, UK
J Exp Biol 208:2363-76. 2005.... - Identification and characterization of visual pigments in caecilians (Amphibia: Gymnophiona), an order of limbless vertebrates with rudimentary eyesS M Mohun
UCL Institute of Ophthalmology, 11 43 Bath Street, London EC1V9EL, UK
J Exp Biol 213:3586-92. 2010..Additionally, visual pigments are short-wavelength shifted in terms of the maximum absorption of light when compared with other amphibian lineages... - Vision in the ultravioletD M Hunt
Institute of Ophthalmology, University College London, United Kingdom
Cell Mol Life Sci 58:1583-98. 2001..In contrast, no loss of UV sensitivity has occurred in the UVS pigments of insects... - Divergent mechanisms for the tuning of shortwave sensitive visual pigments in vertebratesDavid M Hunt
Institute of Ophthalmology, University College London, Bath Street, London, UK
Photochem Photobiol Sci 3:713-20. 2004..In this review, the different molecular mechanisms for the UV or violet shifts are presented and discussed in the context of the structural model of bovine rhodopsin... - Shedding light on serpent sight: the visual pigments of henophidian snakesWayne L Davies
UCL Institute of Ophthalmology, London EC1V9EL, United Kingdom
J Neurosci 29:7519-25. 2009..More data from other snake lineages will be required to test this hypothesis further... - The rod opsin pigments from two marsupial species, the South American bare-tailed woolly opossum and the Australian fat-tailed dunnartDavid M Hunt
Division of Molecular Genetics, Institute of Ophthalmology, University College London, Bath Street, EC1V 9EL, London, UK
Gene 323:157-62. 2003..From microspectrophotometric measurements, the pigments in the two species show an 8 nm difference in peak absorbance; the molecular basis for this spectral shift is discussed and two candidate substitutions are identified... - Multiple photopigments from the Mexican blind cavefish, Astyanax fasciatus: a microspectrophotometric studyJuliet W L Parry
Division of Visual Science, Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
Vision Res 43:31-41. 2003..Evidence was also found for ultraviolet-sensitive single cones and for an additional MWS pigment... - Spectral tuning of shortwave-sensitive visual pigments in vertebratesDavid M Hunt
UCL Institute of Ophthalmology, 11 43 Bath Street, London, EC1V 9EL, UK
Photochem Photobiol 83:303-10. 2007.... - Retinal photoreceptors of paleognathous birds: the ostrich (Struthio camelus) and rhea (Rhea americana)M W Wright
Department of Visual Science, Institute of Ophthalmology, University College London, Bath Street, London EC1V 9EL, UK
Vision Res 41:1-12. 2001..The complement of visual pigments and oil droplets, and the ratio of cone types in the ostrich and rhea, are remarkably similar to those found in many groups of neognathous birds... - The visual pigments of a deep-sea teleost, the pearl eye Scopelarchus analisMarie A Pointer
UCL Institute of Ophthalmology, 11 43 Bath Street, London, EC1V 9EL, UK
J Exp Biol 210:2829-35. 2007..The distribution of these pigments within the multiple retinae of S. analis is discussed... - Rod photopigment deficits in albinos are specific to mammals and arise during retinal developmentS Grant
Department of Sensorimotor Systems, Imperial College School of Medicine, London, UK
Vis Neurosci 18:245-51. 2001..The results strongly suggest that deficits in the rod cell population arise early in development of the mammalian albino retina, but do not generalize to nonmammalian mutants lacking retinal melanin... - Visual pigment coexpression in Guinea pig cones: a microspectrophotometric studyJuliet W L Parry
Department of Visuasl Science, Institute of Ophthalmology, University College London, Bath Street, London, EC1V 9EL, United Kingdom
Invest Ophthalmol Vis Sci 43:1662-5. 2002..Given the relatively low level of coexpression, detectable in only approximately 10% of the cones in the transition region, it is unlikely to cause any significant detriment to dichromatic color vision... - Characterisation of the ultraviolet-sensitive opsin gene in the honey bee, Apis melliferaJ Bellingham
Department of Molecular Genetics, University College London, UK
Eur J Biochem 243:775-81. 1997..Such changes are known to result in spectral shifts in vertebrate pigments. Phylogenetic analysis indicates that the ultraviolet-sensitive pigments represent an ancient class of insect opsins... - Spectral sensitivity of the two-spotted goby Gobiusculus flavescens (Fabricius): a physiological and behavioural studyAnne C Utne-Palm
Department of Biology, University of Bergen, PO Box 7800, N 5020 Bergen, Norway
J Exp Biol 209:2034-41. 2006..However, the peak was at slightly longer wavelengths at 550 nm, suggesting a greater input from LWS cones to the optomotor response... - Shortwave visual sensitivity in tree and flying squirrels reflects changes in lifestyleLívia dos S Carvalho
Curr Biol 16:R81-3. 2006 - Colour vision and speciation in Lake Victoria cichlids of the genus PundamiliaKaren L Carleton
Hubbard Center for Genome Studies and Department of Zoology, 35 Colovos Rd, University of New Hampshire Durham, NH 03824, USA
Mol Ecol 14:4341-53. 2005..However, other factors, such as chromophore shifts and higher order neural processing, should also be investigated to fully understand the physiological basis of differential responses to male mating hues in cichlid fish... - Photopic vision in eels: evidences of color discriminationIlija Damjanović
Institute for Problems of Information Transmission, Academy of Sciences, Moscow, Russia
Ann N Y Acad Sci 1048:69-84. 2005..The existence of green-sensitive and blue-sensitive cone units was thus revealed by both electrophysiological and microspectrophotometric techniques...