Biochemistry and Physiology of Visual Pigments: Symposium by George Wald (auth.), Helmut Langer (eds.)

By George Wald (auth.), Helmut Langer (eds.)

This publication is a record of a four-day Symposium at the Biochemistry and body structure of visible Pigments, which happened instantly after the VIth overseas Congress on Photobiology, held in Bochum, Federal Republic of Germany, in August 1972. This assembly, which introduced jointly approximately 50 investigators of assorted features of the visible method, used to be dedicated to the visible cells of either vertebrates and invertebrates. while the overseas Symposium at the Biochemistry of the Retina, held at Nij­ megen, The Netherlands, in 1968, had focused on vertebrate photoreceptors, this Symposium handled invertebrate photoreceptors in addition, in order that employees in every one box may perhaps turn into accustomed to contemporary growth within the different region. The papers awarded on the Symposium have been divided into six major subject matters, to every of which a half-day consultation used to be committed. The six elements of this publication, following the intro­ ductory lecture, basically correspond to those classes. as well as the invited con­ tributions, the amount encompasses a variety of brief communications by way of different partici­ pants and contributions through invited members, who have been not able to wait. the quantity closes, as did the Symposium, with a basic dialogue, ready and moderated by way of S. L. BONTING, within which an test was once made to combine a variety of new findings, and to reconcile definite issues of disagreement.

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Extra info for Biochemistry and Physiology of Visual Pigments: Symposium Held at Institut fur Tierphysiologie, Ruhr-Universitat Bochum/W. Germany, August 27–30, 1972

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Biophys. 14n, 275-285 (1970). M. L. BONTING: The binding site of retinaldehyde in native rhodopsin. This volume pp. 29-38 (1972). DE GRIP, W. J. , F. J. M. DAEMEN, S. L. BONTING: Biochemical aspects of the visual process. XVIII. Enrichment of rhodopsin in rod outer segment membrane preparations. Vision Research 12, 1697-1707 (1972). WAGGONER, A. S. , L. STRYER: Induced optical activity of the metarhodopsins. Biochemistry 10, 3250-3254 (1971). Discussion Ch. Baumann: According to your reaction scheme, the chromophore migrates back to the opsin if the dehydrogenase is not active.

5. : The synthesis and configuration of neo-b-vitamin A and neoretinene b. Soc. TIL 2651-2652 (1956). 6. : Cis-trans isomeric carotenoids, vitamin A, and acrylpolyenes. Springer-Verlag, Wien (1962). 7. HUBBARD, R. , G. WALD: Pauling and carotenoid streochemistry. In: Structural Chemistry and Molecular Biology, ed. A. RICH, N. DAVIDSON. Freeman, San Francisco and London (1968). 8. N. RAFFERTY: Relationship between absorption spectrum and molecular conformations of 11-cis retinal. ) 224, 591-594 ( 1969).

The "liberated" retinaldehyde appears to remain linked partly to membrane amino groups, since practically complete modification is only obtained after reduction by NADPH-addition during the illumination prior to amidination (Table IV). These findings present in our opinion incontrovertible proof for the involvement of an E-amino-lysine group in the binding of the chromophoric group in native rhodopsin and M II. Whether this involves the same lysine re sidue in rhodopsin and M II, is discussed in the paper by Bonting et al.

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