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Cubic lens mitochondria

, : Cubic lens mitochondria.

Cell membranes may fold up into three-dimensional nanoperiodic cubic structures in biological systems. Similar geometries are well studied in other disciplines such as mathematics, physics and polymer chemistry. The fundamental function of cubic membranes in biological systems has not been uncovered yet; however, their appearance in specialized cell types indicates a role as structural templates or perhaps direct physical entities with specialized biophysical properties. The mitochondria located at the inner segment of the retinal cones of tree shrew (Tupaia glis and Tupaia belangeri) contain unique patterns of concentric cristae with a highly ordered membrane arrangement in three dimensions similar to the photonic nanostructures observed in butterfly wing scales. Using a direct template matching method, we show that the inner mitochondrial membrane folds into multi-layered (8 to 12 layers) gyroid cubic membrane arrangements in the photoreceptor cells. Three-dimensional simulation data demonstrate that such multi-layer gyroid membrane arrangements in the retinal cones of a tree shrew's eye can potentially function as: (i) multi-focal lens; (ii) angle-independent interference filters to block UV light; and (iii) a waveguide photonic crystal. These theoretical results highlight for the first time the significance of multi-layer cubic membrane arrangements to achieve near-quasi-photonic crystal properties through the simple and reversible biological process of continuous membrane folding.


Other references

Griffin, N.; Allen, D.; Wort, J.; Rubens, M.; Padley, S., 2007: Eisenmenger syndrome and idiopathic pulmonary arterial hypertension: do parenchymal lung changes reflect aetiology?. To document the pulmonary vascular changes on thin-section computed tomography (CT) in patients with Eisenmenger syndrome and idiopathic pulmonary arterial hypertension, and to determine whether there is any correlation with pulmonary arterial pre...

Pokorny, J., 1955: Significance of general anesthesia in bronchoscopy. Rozhledy V Chirurgii 34(3): 192-195

Godoy, R.; Groff, S.; O.N.ill, K., 1998: The role of education in neotropical deforestation: household evidence from Amerindians in Honduras. A survey of 101 Tawahka Amerindian households in the Honduran rain forest examined the effects of schooling on the clearance of old-growth rain forest. The results of tobit, ordinary least square, probit, and median regressions suggest that: (i) e...

Brown, J.P., 1971: Susceptibility of the cell walls of some yeasts to lysis by enzymes of Helix pomatia. At Div. Labs. Res., NY Sta. Dept Hlth, Albany, cells of Torulopsis glabrata, Candida albicans and Saccharomyces cerevisiae were assayed during different phases of their growth cycles to compare their susceptibility to the action of helicase.

Balaban A.T., 1988: Modelling of chemical structures by graphs and modelling of the latter by topological indexes. After a brief review of the chemical structure theory which models substances by their formulas, one shows that constitutional formulae of organic compounds correspond to graphs or multigraphs. A few simple graph invariants are defined ; it is sho...

Domienik, J.; Bissinger, A.; Zmyślony, M., 2015: The impact of x-ray tube configuration on the eye lens and extremity doses received by cardiologists in electrophysiology room. The aim of the study was to analyse the influence of the x-ray tube configuration on the radiation doses to eye lens and extremities of cardiologists performing pacemaker implantation procedures in electrophysiology laboratory. The measurements we...

Yu, Y.; Luo, Y.; Yin, G., 2000: Crinoid from Guanling fauna in Guizhou. Guizhou Dizhi, 171: 40-45 (Tol 62

Westerling R., 1967: Recent developments in pharmacology. Svensk Farmaceutisk Tidskrift 71(5): 123-129

Eolyan S.L.; Elikyan R.T., 1982: Clinico laboratory characteristics of tonsillogenic involvement of the heart. Vrachebnoe Delo (8): 62-65

Cornuet, J.M., 1980: Rapid estimation of the number of sex alleles in panmictic honeybee populations. A simple formula, based on Kerr's (1967) [AA 327/68], is rroposed for estimating the number of sex alleles in a panmictic honeybee population. Only the mutation rate and the number of colonies need be known. Values are in agreement with those...