The method includes contacting the sample with a bifunctional material that contains an amino group and a carboxyl group and is positively charged at a first pH to allow binding of the nucleic acid to the bifunctional material; and extracting the nucleic acid at a second pH higher than the ...
11、 solutions both the amino and the carboxyl groups are ionized. The carboxyl group loses a proton and obtains a negative charge, while the amino group gains a proton and hence acquires a positive charge. As a consequence, amino acids possess dipolar characteristics. The dipolar, or zwitterion...
contacting the sample with a bifunctional material containing an amino group and a carboxyl group at a first pH to bind the nucleic acid to the bifunctional material, the bifunctional material being positively charged at the first pH; and releasing the nucleic acid at a second pH which is highe...
美 英 n.〔化〕氨基 网络胺基 英汉 网络释义 n. 1. 〔化〕氨基 释义: 全部,〔化〕氨基,胺基
amidesand the carboxamide group by freecarboxyl group, a series of new reagents were developed and applied to the resolution of amino acids,61β-amino acids,62and β-blockers.63Better separations were achieved using the reagents with free carboxylic group. Using a recently introduced derivative of...
A convenient method for carboxyl group activation in trifluoromethyl substituted α-amino and α-hydroxy acids 喜欢 0 阅读量: 24 作者: U Wucherpfennig 摘要: α-Amino and α-hydroxy acids are key compounds in chemistry of life. Only recently preparative routes to their α-trifluoromethyl ...
ARTICLE Received 21 Oct 2013 | Accepted 19 Sep 2014 | Published 31 Oct 2014 DOI: 10.1038/ncomms6325 Amino- and carboxyl-terminal domains of Filamin-A interact with CRMP1 to mediate Sema3A signalling Fumio Nakamura1, Kosuke Kumeta1, Tomonobu Hida1, Toshinari Isono1,2, Yuichi Nakayama1, ...
(optical isomer II), the isomerism being on the basis of an assymetric carbon atom to which both of an amino group and a carboxyl group are bound and said ability being not inhibited seriously by an amino acid transferase inhibitor &bgr;-chloro-D-alanine, &bgr;-chloro-L-alanine or gaba...
Protecting groupCarboxylic acidOrganic carbamateHydrolysisRate constantStabilité chimiqueGroupe protecteurAcide carboxyliqueCarbamate organiqueSelected carbamates of o -aminoanilides of amino acid derivatives are stable under neutral and acidic aqueous conditions but undergo a quantitative base-catalysed ...
In the course of changing the structure of Marfey's reagent by replacing the alanine amide or valine amide moieties by other amino acid amides and the carboxamide group by free carboxyl group, a series of new reagents were developed and applied to the resolution of amino acids,61β-amino ...