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Tautomeric Forms of Metarhodopsin
Light isomerizes the chromophore of rhodopsin, 11-cis retinal (formerly retinene), to the all-trans configuration. This introduces a succession of unstable intermediates—pre-lumirhodopsin,Expand
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THE ACTION OF LIGHT ON RHODOPSIN.
  • R. Hubbard, A. Kropf
  • Chemistry, Medicine
  • Proceedings of the National Academy of Sciences…
  • 1 February 1958
Rhodopsin, a red visual pigment of vertebrate rods, is composed of the yellow carotenoid derivative, retinene, joined to the colorless protein, opsin. It is synthesized by the combination of opsinExpand
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The sensitivity of the human eye to infra-red radiation.
The spectral sensitivity of human vision has been measured in the near infra-red, in two areas of the dark adapted eye: the central fovea (cones) to 1000 mμ, and a peripheral area, in which theExpand
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THE MECHANISM OF BLEACHING RHODOPSIN
  • A. Kropf, R. Hubbard
  • Chemistry, Medicine
  • Annals of the New York Academy of Sciences
  • 1 November 1958
I t has been known for many years that light can cause cis-trans isomerizations about double bonds. The interconversion of maleic and fumaric acids's is probably the best known example of thisExpand
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[243] Methodology of vitamin A and visual pigments
Publisher Summary This chapter discusses methodology for the assay and preparation of vitamin A and visual pigments, such as rhodopsin, rod opsin, iodopsin, and cone opsin. The assay for rhodopsinExpand
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CIS-TRANS ISOMERS OF VITAMIN A AND RETINENE IN THE RHODOPSIN SYSTEM
  • R. Hubbard, G. Wald
  • Chemistry, Medicine
  • The Journal of general physiology
  • 20 November 1952
Vitamin A and retinene, the carotenoid precursors of rhodopsin, occur in a variety of molecular shapes, cis-trans isomers of one another. For the synthesis of rhodopsin a specific cis isomer ofExpand
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Submersion bradycardia in the newborn elephant seal Mirounga angustirostris.
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THE MOLECULAR WEIGHT OF RHODOPSIN AND THE NATURE OF THE RHODOPSIN-DIGITONIN COMPLEX
  • R. Hubbard
  • Biology, Medicine
  • The Journal of general physiology
  • 20 January 1954
The sedimentation behavior of aqueous solutions of digitonin and of cattle rhodopsin in digitonin has been examined in the ultracentrifuge. In confirmation of earlier work, digitonin was found toExpand
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THE REDUCTION OF RETINENE1 TO VITAMIN A1 IN VITRO
  • G. Wald, R. Hubbard
  • Chemistry, Medicine
  • The Journal of general physiology
  • 20 January 1949
In the surviving vertebrate retina the retinene1 liberated by bleaching rhodopsin is converted quantitatively to vitamin A1. Recent chemical studies have indicated that in this process the aldehydeExpand
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