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48 results about "Non canonical" patented technology

The word "apocrypha" means "things put away" or "things hidden," originating from the Medieval Latin adjective apocryphus, "secret" or "non-canonical," which in turn originated from the Greek adjective ἀπόκρυφος (apokryphos), "obscure," from the verb ἀποκρύπτειν (apokryptein), "to hide away.".

Novel aromatic prenyltransferases, nucleic acids encoding same and uses therefor

ActiveUS20060183211A1Sugar derivativesMicrobiological testing/measurementPrenyltransferase activityIsoprene
In accordance with the present invention, a novel aromatic prenyltransferase, Orf2 from Streptomyces sp. strain CL190, involved in naphterpin biosynthesis has been identified and the structure thereof elucidated. This prenyltransferase catalyzes the formation of a C—C bond between a prenyl group and a compound containing an aromatic nucleus, and also displays C—O bond formation activity. Numerous crystallographic structures of the prenyltransferase have been solved and refined, e.g., (1) prenyltransferase complexed with a buffer molecule (TAPS), (2) prenyltransferase as a binary complex with geranyl diphosphate (GPP) and Mg2+, and prenyltransferase as ternary complexes with a non-hydrolyzable substrate analogue, geranyl S-thiolodiphosphate (GSPP) and either (3) 1,6-dihydroxynaphthalene (1,6-DHN), or (4) flaviolin (i.e., 2,5,7-trihydroxy-1,4-naphthoquinone, which is the oxidized product of 1,3,6,8-tetrahydroxynaphthalene (THN)). These structures have been solved and refined to 1.5 Å, 2.25 Å, 1.95 Å and 2.02 Å, respectively. This first structure of an aromatic prenyltransferase displays an unexpected and non-canonical (β/α)-barrel architecture. The complexes with both aromatic substrates and prenyl containing substrates and analogs delineate the active site and are consistent with a proposed electrophilic mechanism of prenyl group transfer. These structures also provide a mechanistic basis for understanding prenyl chain length determination and aromatic co-substrate recognition in this structurally unique family of aromatic prenyltransferases. This structural information is useful for predicting the aromatic prenyltransferase activity of proteins.
Owner:SALK INST FOR BIOLOGICAL STUDIES

Inferior-quality fingerprint grayscale image enhancement method on basis of three gaussian filtering

InactiveCN102682432AIncrease contrastBoost low spatial frequency componentsImage enhancementPattern recognitionMathematical model
The invention discloses an inferior-quality fingerprint grayscale image enhancement method on the basis of three gaussian filtering. The method is used for studying parameter values in a three-gaussian model of a non-canonical receptive field in a human visual system according to an image characteristic that fingerprint ridges and furrows are alternately distributed and through introducing the three-gaussian model of the non-canonical receptive field in the human visual system into fingerprint grayscale image processing. The method comprises the following steps of: according to the size of a fingerprint grayscale image, obtaining fingerprint characteristic parameters; carrying out three-gaussian one-sided filtering on the fingerprint grayscale image to obtain neighborhood subjective feeling brightness of the fingerprint grayscale image; and according to a difference between the obtained neighborhood subjective feeling brightness and an actual light intensity, carrying out linear local contrast adjustment on the fingerprint grayscale image. The method disclosed by the invention can be used for effectively improving the overall and local contrast and brightness and highlighting the detail characteristics of dark areas, thus being especially applicable to the processing on inferior-quality fingerprint grayscale images.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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