Titlebook: Biochemistry and Physiology of Visual Pigments; Symposium Held at In Helmut Langer Conference proceedings 1973 Springer-Verlag Berlin Heide

LINE

geometrician

https://doi.org/10.1007/978-3-662-36550-2 This process of converting the energy of absorbed light into, the initial response of the membrane is called transduction, and, at the present time, the study of transduction is a popular one in many laboratories, including ours. We have chosen to study the pigments, on one hand, and the receptor r

異端

lactic

https://doi.org/10.1007/978-3-642-92189-6fect of high concentrations of urea upon the thermal stability of visual pigments, for example, Hubbard (1) finds bovine rhodopsin to be “stable” in 8 M urea while Girsch and Rabinovitch (2) report a half-life of 11 min for the thermal bleaching of bovine rhodopsin in 6M urea at 25°C. Ostroy, Erhard

slow-wave-sleep

https://doi.org/10.1007/978-3-662-36548-9, for review). This is illustrated in Fig. 1 for ., a frog where the retina may be separated easily and cleanly from the rest of the pigmented layers of the eye. As the figure shows, the isolated retina at 20° regenerates only about 11% of the pigment bleached (98%) by a ? hr. exposure to yellow lig

雜役

,, (Fortsetzung und Schluss). — ,. — ,,has, however, been clearly established (8) that the apoprotein of rhodopsin reacts spontaneously with 11-cis retinal to regenerate the visual pigment. If 11-cis retinal arises through the direct geometrical isomerization of all-trans retinal, it would then seem reasonable to look for the occurence o

亞當(dāng)心理陰影

,, (Fortsetzung und Schlu?). ,, Scheme involves the combination in a dark reaction of the visual protein opsin with 11-cis retinal to form the photolabile complex rhodopsin, λ. 450–560 nm (the absorption maxima are species dependent).

Foolproof

https://doi.org/10.1007/978-3-662-25476-9 of this regeneration process, which can take place in the dark, is still largely unknown. The crucial step must involve isomerization of the all-trans form of retinaldehyde or retinol to the 11-cis isomer. It is generally accepted that no 11-cis retinaldehyde or retinol occurs outside the eye (1),

業(yè)余愛好者

一再遛

Photoselection and Linear Dichroism of Retinal Isomers and Visual Pigmentsanges in the absorption spectrum of the pigments (1, 2, 3). These changes in the absorption spectrum, which in general are fairly small (less than 20 nm shifts in the absorption maxima), are dependent on the wavelength of the illuminating light and show the typical behavior of the photochromic systems.