Reactive aldehyde‐modified DNA was prepared in two steps by Suzuki cross‐coupling of halogenated nucleoside triphosphates (dNTPs) with 4‐formylthiophene‐2‐boronic acid and subsequent polymerase incorporation of the modified nucleotides into DNA (see scheme; PEX=primer extension, PCR=polymerase chain reaction). Formation of hydrazones with arylhydrazines under aqueous conditions was used for DNA staining
incorporated into DNA by polymerase catalyzed primer extension (PEX). This direct incorporation of hydrazone‐linked dNTPs was compared to previously reported incorporation of aldehyde‐modified dNTPs followed by postsynthetic hydrazone formation on DNA to show that the direct incorporation can be used for incorporation of more hydrazone units, however, cleaner PEX products are formed by incorporation of aldehydes
申请人:UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE
公开号:US20170121599A1
公开(公告)日:2017-05-04
The present invention relates to a process for making an asymmetric fluorophore. The asymmetric fluorophore is useful as a stain for staining live cells or fixed cell and provides whole-cell staining of such cells.
Determination of Nitrite in Waters by Microplate Fluorescence Spectroscopy and HPLC with Fluorescence Detection
作者:Andrea Büldt、Uwe Karst
DOI:10.1021/ac981330t
日期:1999.8.1
A selective and versatile fluorescence spectroscopic method for the determination of nitrite in waters has been developed. Nitrite reacts in the presence of mineral acids with the nonfluorescent N-methyl-4-hydrazino-7-nitrobenzofurazan forming N-methyl-4-amino-7-nitrobenzofurazan, which can be detected by fluorescence spectroscopy with an excitation maximum at lambda = 468 nm and an emission maximum
Multifunctional molecular weight protein ladders and methods of making thereof are disclosed herein that are useful for determining the molecular weight of a test protein and/or the relative mass or amount of the test protein in a protein separation assay, such as gel electrophoresis or western blotting. Also included are compounds of Formula I (e.g., mono acetylated MP-11 NHS ester) that may be used to label purified proteins of the protein ladder. The MP-11 label protein ladder can be detected on a blotting membrane by exposing the microperoxidase to a suitable substrate, such as a chromogenic substrate or a chemiluminescent substrate.
本文公开了多功能分子量蛋白梯及其制造方法,可用于在凝胶电泳或 Western 印迹等蛋白质分离试验中确定测试蛋白质的分子量和/或测试蛋白质的相对质量或数量。此外,还包括式 I 化合物(如单乙酰化 MP-11 NHS 酯),可用于标记蛋白梯的纯化蛋白。将微过氧化物酶暴露于合适的底物(如显色底物或化学发光底物)上,可在印迹膜上检测 MP-11 标记蛋白梯。