Direct Resolution of Optically Active Isomers on Chiral Packings Containing Ergoline Skeletons. 5. Enantioseparation of Amino Acid Derivatives
作者:A. Messina、A. M. Girelli、M. Flieger、M. Sinibaldi、P. Sedmera、L. Cvak
DOI:10.1021/ac950698c
日期:1996.4.1
alkaloid-based chiral stationary phase preparation is described. Synthesis is based on bonding the allyl derivative of terguride to mercaptopropylsilanized silica gel. The packing exhibits higher content of chiral selector, stability, reproducibility, and enantioselectivity toward amino acids compared to that previously studied. The chromatographic behavior of amino acids with different side chains and substituent
UNNATURAL AMINO ACIDS COMPRISING A CYCLOOCTYNYL OR TRANS-CYCLOOCTENYL ANALOG GROUP AND USES THEREOF
申请人:EMBL
公开号:US20140073764A1
公开(公告)日:2014-03-13
The present invention relates to unnatural amino acids comprising a cyclooctynyl or trans-cyclooctenyl analog group and having formula (I) or an acid or base addition salt thereof. The invention also relates to the use of said unnatural amino acids, kits and processes for preparation of polypeptides that comprise one or more than one cyclooctynyl or trans-cyclooctenyl analog group. These polypeptides can be covalently modified by in vitro or in vivo reaction with compounds comprising an azide, nitrile oxide, nitrone, diazocarbonyl or 1,2,4,5-tetrazine group.
MULTIPLE CYCLOADDITION REACTIONS FOR LABELING OF MOLECULES
申请人:EUROPEAN MOLECULAR BIOLOGY LABORATORY
公开号:US20160340297A1
公开(公告)日:2016-11-24
The present invention relates to methods for linking tetrazines with dienophiles to establish at least two linkages by sequentially performing at least two cycloaddition reactions. The methods in particular allow establishing multi-labeling strategies. In particular, the invention relates to methods for forming linkages by cycloaddition reactions, wherein the method comprises reacting a first alkyl-substituted tetrazine with a first dienophile comprising a irans-cyclooctenyl group followed by reacting a second tetrazine with a second dienophile comprising a cyclooctynyl group, wherein the reaction of the first tetrazine with the first dienophile proceeds in the presence of the second dienophile.
FLUORESCENT CDK INHIBITORS FOR TREATMENT OF CANCER
申请人:Yenugonda Venkata Mahidhar
公开号:US20110269178A1
公开(公告)日:2011-11-03
Disclosed are molecules and their synthesis. The fluorescent moiety also facilitates screening, tracking, and pharmacodynamic studies of the drug in a biological system both in vitro and in vivo.
Method of assay of enzymatic activity and apparatus therefor
申请人:TOSOH CORPORATION
公开号:EP0521636A1
公开(公告)日:1993-01-07
Method of assay of enzymatic activity, comprising projecting excitation light to a sample containing an enzyme, a substrate which forms a product by action of the enzyme, and a reference substance which is insensitive to the action of the enzyme but emits fluorescence; obtaining a first measured value of fluorescence intensity of the sample at a first wavelength region which includes fluorescence emitted by the substrate or the product at least, obtaining a second measured value of fluorescence intensity at a second wavelength region which is different from the first wavelength region for the first measured value and includes fluorescence emitted by the reference substance; and assaying the enzymatic activity from the ratio of the first measured value to the second measured value and apparatus for performing the method. The method assures high accuracy and high sensitivity of measurement in enzyme labeled immunoassay and enzyme labeled DNA hybridization.
酶活性检测方法,包括向含有酶的样品、在酶的作用下形成产物的底物和对酶的作用不敏感但发射荧光的参比物质投射激发光;在第一波长区域获得样品荧光强度的第一测量值,该值至少包括底物或产物发出的荧光,在第二波长区域获得荧光强度的第二测量值,该值不同于第一测量值的第一波长区域,且包括参考物质发出的荧光;根据第一测量值与第二测量值的比值和用于执行该方法的装置来测定酶活性。该方法可确保酶标记免疫测定和酶标记 DNA 杂交测量的高准确性和高灵敏度。