Ligands labelled

The symbol u>, when used to denote a 3c/4e triad (e.g., cuAbc). bond orbital (e.g., u>Ab c) or ligand label (e.g., F ), is unlikely to be confused with other common usages such as angular frequency. Its shape has three points and two connecting arcs to suggest three-center character with two connecting electron pairs. 

Ligand labeling with fluorescent metal chelates has created a versatile class of fluorescent probes. The chelates of rare earth metals have unique emission characteristics in that, upon excitation of aromatic portions of the ligands of the lanthanide complex, the energy of excitation is efficiently transferred to the lanthanide ion. This causes f-f transitions that produce very narrow almost line-like emission bands that permit all of the emitted light to be collected by the detector with narrow emission slits. In addition, the rare earth... 

The most important residues in neighbor, ing subunits that influence ACh binding art W57 of the 5 subunit and the homologous W5 of the y subunit (6, 29). The "minus" side o1 the AChBP interface, shown in Fig. 11,6b would be the y/e or the 8 subunit in the receptor, but in the AChBP it is another identica subunit. The residues shown to be in contaci with the ligand, labeled in Fig. 11,6b, mostlj have no obvious analog in the ACh receptor The one important exception is W53, which corresponds to the tryptophan residues men. tioned above. Consequently, the snail protein... 

Alberto R, Schibli R, Schubiger AP, Abram U, Pietzsch HJ, Johannsen B (1999) First application of /flc-[ Tc(OH2)3(CO)3] in bioorganometallic chemistry design, structiue, and in vitro affinity of a 5-HTlA receptor ligand labeled with Tc-99m. J Am Chem Soc 121 6076-6077 Alberto R, Schibli R, Waibel R, Abram U, Schubiger AP (1999) Basic aqueous chemistry of M(0H2)3(C0)J (MRe, Tc) directed towards radiopharmaceutical application. Coord Chem Rev 192 901-919... 

Alberto R, Schibli R, Schubiger PA et al (1999) First application of fac-[ Tc OU2)3iCO) ] in bioorganometallic chemistry design, structure, and in vitro affinity of a 5-HTia receptor ligand labelled with J Am Chem Soc 121 6076-6077... 

The active site model of a modern propylene polymerization catalyst, 3, shown in Figure 2 demonstrates the molecular complexity of the question at hand. A large and elaborate ligand, labeled... 

Figure 3. Summary of the mechanism of the overall catalytic cycle. The ruthenium complexes within solid boxes have been isolated and fully characterized. Those within dashed boxes have been observed, but neither fully characterized nor isolated. The identity of the two ligands, labeled L, in the precursor to 3 remains obscure. The hydroxymethoxycarbene has not been observed. (Reproduced with permission from ref. 19. Copyright 1994 American Chemical Society).

Pappas, T.C., Gametchu, B. Watson, C.S. 1995. Membrane estrogen receptors identified by multiple antibody and impeded ligand labeling. FASEB Journal, 9, 404—410. 

Figure 2.17 Putative structure of the EPR derived structure for Species 1 of the human R160Q SO variant. The ligand labeled as X (blue) that is oriented trans to the Mo O apical has not been defined. Nuclei that are coupled to the Mo(v) spin are labeled in red. ...

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