Receptors abiotic

The mechanism of recognition of most supramolecular entities (such as abiotic receptors) is the formation of several hydrogen bonds. Since heterocyclic tautomers possess both strong HBA and HBD properties (see Sections III,G, V,D,2, and VI,G), they are often used for this purpose. For instance, the hydrogen bond network formed by 5,5 -linked bis(2-pyridones) has been used by Dickert to obtain sensors (96BBG1312). 

Houk RJT, Tobey SL, Anslyn EV (2005) Abiotic Guanidinium Receptors for Anion Molecular Recognition and Sensing. 255 199-229 Hue I, see Brizard A (2005) 256 167-218... 

Receptor populations considered, which may include humans, animals, plants, micro-organisms, specific habitats or communities, or abiotic receptors subpopulations that are exposed to unusually high pollutant levels may be highlighted. 

Houk RJT, Tobey SL, Anslyn EV (2005) Abiotic Guanidinium Receptors for Anion Molecular... 

Allosteric effects play a major role in biology, for instance in the conformational changes induced by the binding of an effector and regulating the activity of an enzyme [9.14a] they have also been studied in synthetic receptors [8.201, 8.211, 9.14b, c]. Similarly, cooperativity, a thermodynamically well defined process [9.15a], is displayed by a number of biological species as well as by abiotic ones [8.70a, 8.201, 9.15b-d] (see also Section 9.3.1, [9.64, 9.65]), in particular in organized media such as polymer solutions or gels [7.8cd, 8.290, 8.292]. 

To summarize, the responsiveness of phenylpropanoid metabolism to abiotic stressors that can severely and irreversible affect several plant processes constitute a critical trait to increase reproductive fitness and survival of land plants [Raushier, 2006]. The timely activation of the pathway is tightly regulated by a complex network of receptors, signaling cascades, and transcriptional regulators [Swindell, 2006] that integrate internal and external cues and ensure optimal use of metabolic resources. 

Figure 6 A sketch of the guanidinium oxoanion binding motif as it occurs in many biological and abiotic receptors.

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