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6726 results about "Lysine" patented technology

Lysine (symbol Lys or K) is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated −NH₃⁺ form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −COO⁻ form under biological conditions), and a side chain lysyl ((CH₂)₄NH₂), classifying it as a basic, charged (at physiological pH), aliphatic amino acid. It is encoded by the codons, AAA and AAG. Like almost all other amino acids, the α-carbon is chiral and lysine may refer to either enantiomer or a racemic mixture of both. For the purpose of this article, lysine will refer to the biologically active enantiomer L-lysine, where the α-carbon is in the S configuration.

Crosslinked gels comprising polyalkyleneimines, and their uses as medical devices

One aspect of the present invention generally relates to methods of sealing a wound or tissue plane or filling a void splace. In a preferred embodiment, the wound is an ophthalmic, pleural or dural wound. In certain instances, the compositions used to seal the wound or tissue plane comprises a polyalkyleneamine. In a preferred embodiment, the polyalkyleneamine is polyethyleneimine. Treatment of the polyethyleneimine with a cross-linking reagent causes the polyethyleneimine polymers to polymerize forming a seal. In certain instances, the cross-linking reagent is a polyethylene glycol having reactive terminal groups. In certain instances, the reactive terminal groups are activated esters, such as N-hydroxy succinimide ester. In certain instances, the reactive terminal groups are isocyanates. In certain instances, the polyethyleneimine has a lysine, cysteine, isocysteine or other nucleophilic group attached to the periphery of the polymer. In certain instances, the polyethyleneimine is mixed with a second polymer, such as a polyethylene glycol containing nucleophilic groups. In certain instances, the compositions used to seal the wound or tissue plane are formed by reacting a polyalkyleneamine bearing electrophilic groups with a cross-linking reagent containing nucleophilic groups. In certain instances, the electrophilic groups on the polyalkyleneamine are activated esters, such as N-hydroxy succinimide ester. In certain instances, the compositions used to seal the wound or tissue plane are formed by reacting a polyalkyleneamine bearing photopolymerizable groups with ultraviolet or visibile light. Compositions used to seal the wound which contain PEI or a derivative of PEI are found to adhere tightly to the tissue. Other aspects of the present invention relate to methods of filling a void of a patient or adhering tissue. In certain instances, the methods use a polyalkyleneamine. In a preferred embodiment, the polyalkyleneamine is polyethyleneimine. Another aspect of the present invention relates to a polymeric composition formed by exposing a polyalkyleneamine to an activated polyalkylene glycol. In certain instances, the composition is attached to mammalian tissue.
Owner:SQUARE 1 BANK

Pharmaceutical composition and method for the transdermal delivery of calcium

The present invention relates to a method and transdermal pharmaceutical composition for preventing or reducing the likelihood of calcium deficiency or imbalances caused by calcium deficiency. The transdermal pharmaceutical composition includes a therapeutically effective amount of a pharmaceutically acceptable salt of calcium and a pharmaceutically acceptable carrier constituting a pluronic lecithin organogel. In addition to calcium, the transdermal pharmaceutical composition may also contain a therapeutically effective amount of: (1) a pharmaceutically acceptably salt of other minerals such as magnesium, zinc, selenium, manganese, or chromium; (2) a vitamin such as vitamin A, vitamin D, vitamin C, vitamin E or B-complex vitamins, choline, lecithin, inositol, PABA, biotin, or bioflavomoids; (3) a carotenoid such as lycopene or lutein; (4) a hormone such as dehydroepiandrosterone, progesterone, pregnenolone, or melatonin; (5) an amino acid such as arginine, glutamine, lysine, phenylalanine, tyrosine, GABA, tryptophan, carnitine, or acetyl-l-carnitine; (6) a fatty acid such as a fish oil or flax seed oil; (7) a vita-nutrient such as coenzyme Q10; (8) a cartilage building nutrient such as glucosamine, chondroitin, or MSM, (9) a herb such as ginkgo biloba, echinacea, 5-HTP, St. John's wort, or saw palmetto; or (9) any combination thereof. The transdermal pharmaceutical composition may be topically administered to a human to prevent or reduce the likelihood of calcium deficiency or imbalances caused by calcium deficiency such as hypertension, high cholesterol, colon and rectal cancer, osteomalacia, rickets, osteoporosis, cardiovascular disease, preeclampsia, tooth decay, and premenstrual syndrome.
Owner:BRIERRE BARBARA T

Gene products of bacillus licheniformis which form odorous substances and improved biotechnological production methods based thereon

The present invention relates to 25 hitherto undescribed genes of B. licheniformis and gene products derived therefrom and all sufficiently homologous nucleic acids and proteins thereof. They occur in five different metabolic pathways for the formation of odorous substances. The metabolic pathways in question are for the synthesis of: 1) isovalerian acid (as part of the catabolism of leucine), 2) 2-methylbutyric acid and/or isobutyric acid (as part of the catabolism of valine and/or isoleucine), 3) butanol and/or butyric acid (as part of the metabolism of butyric acid), 4) propyl acid (as part of the metabolism of propionate) and/or 5) cadaverine and/or putrescine (as parts of the catabolism of lysine and/or arginine). The identification of these genes allows biotechnological production methods to be developed that are improved to the extent that, to assist these nucleic acids, the formation of the odorous substances synthesized via these metabolic pathways can be reduced by deactivating the corresponding genes in the micro-organism used for the biotechnological production. In addition, these gene products are thus available for preparing reactions or for methods according to their respective biochemical properties.
Owner:BASF AG
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