Výsledky vyhledávání - "J. M. L. Courtin"

Synthesis of retinals labelled with 13C in the cyclohexene ring

Autor: J. van Haveren, Johan Lugtenburg, C. J. Van Haeringen, J. B. Shadid, J. M. L. Courtin, R. Gebhard

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 108:207-214

In this paper we report the synthesis of five retinals, specifically mono-labelled with 13C at the positions 1, 2, 3 and 4 and di-labelled with 13C at the positions 16 and 17, with more than 98% chemical purity and high 13C incorporation. (1-13C)- an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::675c9444631ece2486005b99b43e3b62
https://doi.org/10.1002/recl.19891080602

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Carbon-13 magic-angle spinning NMR studies of bathorhodopsin, the primary photoproduct of rhodopsin

Autor: R. Gebhard, H. J. M. de Groot, J. M. L. Courtin, Steven O. Smith, Johan Lugtenburg

Publikováno v: Biochemistry, 30(30), 7409-7415

Magic-angle spinning NMR spectra have been obtained of the bathorhodopsin photointermediate trapped at low temperature (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d536526009761b27e145c68d94aa94e8
https://hdl.handle.net/1887/3245433

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Iterative fitting of magic-angle-spinning NMR spectra

Autor: C. Winkel, Robert G. Griffin, S. O. Smith, J Lugtenburgt, J. M. L. Courtin, A.C Kolbert, H. J. M. de Groot, Judith Herzfeld

Publikováno v: Journal of Magnetic Resonance, 91(1), 30-38

An approach for the analysis of magic-angle-spinning NMR spectra which combines nonlinear iterative and linear analytical procedures for fitting sideband spectra is presented. Parameter values, as well as statistical errors, are extracted from the ex

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5387ae401d1cee1c3de68264958d07d4
https://hdl.handle.net/1887/3465960

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Solid-state NMR studies of mechanism of the opsin shift in the visual pigment rhodopsin

Autor: J. Lugtenburg, M. E. Miley, Robert G. Griffin, I. Palings, H. J. M. de Groot, S. O. Smith, J. M. L. Courtin, Richard A. Mathies

Publikováno v: Biochemistry, 29(35), 8158-8164. AMER CHEMICAL SOC

Solid-state 13C NMR spectra have been obtained of bovine rhodopsin and isorhodopsin regenerated with retinal selectively 13C labeled along the polyene chain. In rhodopsin, the chemical shifts for 13C-5, 13C-6, 13C-7, 13C-14, and 13C-15 correspond clo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3eb4c051914bed2c1aa041dff4ada4c2
https://hdl.handle.net/1887/3281790

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Solid-state carbon-13 and nitrogen-15 NMR study of the low pH forms of bacteriorhodopsin

Autor: Judith Herzfeld, E. M. M. Van Den Berg, H. J. M. de Groot, Steven O. Smith, C. Winkel, Robert G. Griffin, J. M. L. Courtin, J. Lugtenburg

Publikováno v: Biochemistry, 29(29), 6873-6883

The visible absorption of bacteriorhodopsin (bR) is highly sensitive to pH, the maximum shifting from 568 nm (pH 7) to approximately 600 nm (pH 2) and back to 565 nm (pH 0) as the pH is decreased further with HCl. Blue membrane (lambda max greater th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::084b8f81aca09d214af74bc116ceb850
https://doi.org/10.1021/bi00481a017

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Vibrational analysis of the all-trans-retinal chromophore in light-adapted bacteriorhodopsin

Autor: Richard A. Mathies, Anne B. Myers, J. A. Pardoen, Steven O. Smith, Mark S. Braiman, Johan Lugtenburg, J. M. L. Courtin, C. Winkel

Publikováno v: Journal of the American Chemical Society. 109:3108-3125

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4949364748830881e0fc1e673ffcddd3
https://doi.org/10.1021/ja00244a038

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Solid-state carbon-13 NMR of the retinal chromophore in photointermediates of bacteriorhodopsin: characterization of two forms of M

Autor: J. Lugtenburg, S. O. Smith, J. M. L. Courtin, E. M. M. Van Den Berg, Judith Herzfeld, C. Winkel, Robert G. Griffin

Publikováno v: Biochemistry. 28:237-243

Solid-state {sup 13}C NMR spectra of the M photocycle intermediate of bacteriorhodopsin (bR) have been obtained from purple membrane regenerated with retinal specifically {sup 13}C labeled at positions 5, 12, 13, 14, and 15. The M intermediate was tr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32ec215de7354df514c1a6c46289aea3
https://doi.org/10.1021/bi00427a033

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Bacteriorhodopsin: The influence of the cyclohexene-ring methyls

Autor: R. L. van der Bend, P. L. Biesheuvel, K. Van Dam, Johan Lugtenburg, J. M. L. Courtin, L. Verhagen

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 106:112-119

Four ring-demethylated retinals, viz. 1,1,5′-tridemethylretinal, 1,1′-didemethylretinal, 1,5-didemethylretinal and 1-didemethylretinal, have been synthesized via new and simple schemes. The properties of these modified retinals, their protonated

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ad921c842f945707a3cc01c522dd1a7f
https://doi.org/10.1002/recl.19871060402

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Synthesis of 5-, 6-, 7- and 18-mono-13 C-labelled retinals

Autor: Johan Lugtenburg, A. J. M. Peters, G. K. 'T Lam, J. M. L. Courtin

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 104:281-288

Four retinals labelled at positions 5, 6, 7 and 18 with 13C were obtained via simple schemes involving only a few steps with > 98% chemical purity and 92% 13C incorporation. (5-13C)Retinal was obtained in 26% yield from K13CN. (6-13C)- and (7-13C)Ret

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bb8dba155b975f19ba279f729e52ca33
https://doi.org/10.1002/recl.19851041103

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