Photolabile and paramagnetic reagents for the investigation of transmembrane signaling events

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Abstract
To investigate the dynamics of membrane processes that may be integral components of specific transmembrane signaling events we have synthesized several novel paramagnetic probes and their photoreactive counterparts. The structure of these probes was designed to (1) restrict “flipping” across the membrane bilayer; (2) contain paramagnetic or photoreactive moieties that could be placed at specific depths within the bilayer; (3) provide information about membrane structure as well as dynamics of protein movement; and (4) in the case of the photoreactive probes, be of high specific radioactivity.The molecules described in this paper consist of amino acid, dipeptide, or carbohydrate groups attached to arylazide‐ or nitroxide‐bearing fatty acids. The synthesis and initial characterization of these membrane probes is described.

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