23-hydroxy Betulinic Acid

3-Hydroxy-Fatty Acid Analysis by Gas Chromatography-Mass Spectrometry

the functioning of organs and systems whose high-energy requirements utilize fats for a continuous energy source, such as heart and skeletal muscle. This method quantitatively measures intermediate metabolites of fatty acid β-oxidation, specifically the 3-hydroxy

4-Hydroxy-2-Nonenal (4-HNE) Staining by Anti-HNE Antibody

, and can also attack DNA or protein (1 ). During the process of lipid peroxidation, polyunsaturated fatty acids (PUFA), especially linoliec acid, arachidonic acid, and docosahexaenoic acid, in biomembranes are degraded to a great variety of water-soluble, short-chain

氨基酸amino acid

着（例如：β -丙氨酸，γ -氨基丁酸）。氨基酸是本世纪初由费歇尔等（ E． Fisher etal．）阐明的。构成一般蛋白质的有 23种（半胱氨酸和胱氨酸另计），立体构型均属 L-型。这些氨基酸的简称详见“氨基酸合成”词目中。氨基酸根据氨基与羧基数分类为中性即一氨基一羧酸（如丙氨酸、亮氨酸等），酸性即一氨基二羧酸（如天冬氨酸、谷氨酸），碱性的即二氨基一羧酸（如赖氨酸）等。此外还把含有芳香环、羟基、巯基的氨基酸分别分类为芳香族氨基酸（如酪氨酸、苯丙氨酸、色氨酸）、含羟基氨基酸（如丝氨酸、苏氨酸）、含硫