Structural organisation

Figure 3.2. Structure of some G-protein-linked receptors of the rhodopsin superfamily (a) the structural organisation of the predicted hydrophilic and hydrophobic domains of the receptor (b) how the hydrophilic regions form extracellular and intracellular loops, being anchored by the seven hydrophobic transmembrane domains.

E. Raymundo-Pinero, P. Azais, T. Cacciaguerra, D. Cazorla-Amoros. A. Linares-Solano, and F. Beguin, KOH and NaOH activation mechanisms of multiwalled carbon nanotubes with different structural organisation, Carbon, 43, 786-795 (2005). 

Figure 14.10 Diagrammatic representation of regulation of the opening of an ion channel by phosphoiylation of a protein in the channel. The neurotransmitter-receptor complex functions as a nucleotide exchange factor to activate a G-protein which then activates a protein kinase. This is identical to control of G-proteins in the action of hormones (Chapter 12, see Figure 12.21). Phosphorylation of a protein in the ion channel opens it to allow movement of Na+ ions. The formation of the complex, activation of the G-protein and the kinase takes place on the postsynaptic membrane. An example of the structural organisation and the involvement of a G-protein is shown in Chapter 12 (Figure 12.6).

Crystalline Hydroxylapatite is a structurally organised, highly polar material which, in aqueous solution... 

Crystalline Hydroxylapatite is a structurally organised, highly polar material which, in aqueous solution (in buffers) strongly adsorbs macromolecules such as proteins and nucleic acids, permitting their separation by virtue of the interaction with charged phosphate groups and calcium ions, as well by physical adsorption. The... 

Waye, J S and Willard, H. F (1986) Structure, organisation, and sequence of alpha satellite DNA from human chromosome 17 evidence for evolution by unequal crossing-over and an ancestral pentamer repeat shared with the human X chromosome. Mol Cell Biol 6, 3156-3165. 

What are the functions, if any, of the cubic membranes It may be that cubic membranes are but an inevitable self-assembled product of the complex molecular soup of lipids and proteins the result of molecular packing considerations and inter-molecular interactions. This would be in analogy with known phase behaviour in equilibrium systems. Even though this is a very appealing solution to the long and unresolved debate about "non-lamellar" lipids in conjunction with cell membranes, we rather believe that these structural organisations have been chosen to fulfil a purpose (see, e.g. [134] and references therein for current theories, and [4] for a more comprehensive discussion), and the formation cannot be rationalised solely by molecular packing. 

Research aims to study the structural organisation of pheromone secreting glands using light microscopy and transmission and scanning electron microscopy. 

Although no explicit theoretical framework has been developed for analysing the National Allocation Plan (NAP) process in Spain, insights from the public choice and institutional path dependency approaches have been used in order to structure, organise and interpret the available information. 

---