Cadystins induced in a fission yeast treated with Cd2+ are the higher homologs of glutathione. In the present work, glutathione was incubated with Carboxypeptidase Y at a high substrate concentration. The reaction afforded not only the degraded product, but also cadystins and their analogs. A possible transformation pathway for glutathione by this enzyme is proposed.
镉处理的分裂酵母中诱导产生的镉素是谷胱甘肽的高级同源物。在本研究中,谷胱甘肽在高底物浓度下与羧肽酶 Y 共同孵育。反应不仅产生了降解产物,还生成了镉素及其类似物。据此,我们提出了一种谷胱甘肽通过该酶可能的转化途径。
Amino acids and peptides. XXVII. Synthesis of phytochelatin-related peptides and examination of their heavy metal-binding properties.
Phytochelatin (PC)-related peptides were prepared by a conventional solution method and their heavy metal-binding properties were examined. Different from the Cu2+ and Cu+ -binding properties of metallothionein (MT)-related peptides, the Cu2+ and Cu+ -binding properties of PC-related peptides were fairly dependent on structure. It is of interest that gamma-Glu-Cys-Gly (glutathione) exhibited quite
Mass spectrometric detection, identification, and fragmentation of arseno-phytochelatins
作者:Maria I. H. Schmied-Tobies、Uriel Arroyo-Abad、Jürgen Mattusch、Thorsten Reemtsma
DOI:10.1002/jms.3435
日期:2014.11
via their thiol groups. The composition, structure, and massspectrometricfragmentation of arseno-PC (As-PC) with PC of different degree of oligomerization (PC2-PC5) in solution were studied using liquid chromatography coupled in parallel to inductively coupled plasma mass spectrometry and electrospray ionization quadrupole time-of-flight mass spectrometry. As-PC were detected from As(PC2) to As(PC5)
植物螯合素(PC)是植物中的半胱氨酸富集的寡肽,可通过其巯基与有毒金属和准金属配位。研究了液相色谱与电感耦合等离子体质谱和电喷雾电离四极杆并联的液相色谱法研究了溶液中不同低聚度(PC2-PC5)的砷化PC(As-PC)的组成,结构和质谱碎裂情况飞行时间质谱。从As(PC2)到As(PC5)中检测到As-PC,且异构体的数量不断增加,这些异构体在与As结合的巯基位置上有所不同。在这些异构体的情况下,热力学建模支持了鉴定过程。As-PC的质谱碎片化未遵循已建立的肽段模式,而是由一系列含As的环状阳离子的形成控制,这些阳离子通过S,N或O与As配合。30种As-PC的结构建议阐述了m / z 147.92至m / z 1290.18范围内的碎片离子。这些碎片离子中的许多是几种As-PC的特征,并且可能适用于筛选植物提取物中的As-PC。质谱数据为将来通过液相色谱串联质谱联用多反应监测技术更灵敏地
Partikel ein Substrat umfassend und eine anionbindende Schicht
申请人:Merck Patent GmbH
公开号:EP1860158A2
公开(公告)日:2007-11-28
Die vorliegende Erfindung betrifft Partikel umfassend Substrate, und eine anionbindende Schicht, wobei die anionbindende Schicht einen oder mehrere anionbildende organische Wirkstoffe bzw. Wirkstoff/Farbmittel-Gemische enthält. Weiterhin betrifft die vorliegende Erfindung Verfahren zur Herstellung von Partikeln sowie deren Verwendung in Kosmetika, Pharmazeutika, Formulierungen, Lacken, Farben, Kunststoffen, Folien, im Sicherheitsdruck, in Sicherheitsmerkmalen in Dokumenten und Ausweisen, zur Saatguteinfärbung, zur Lebensmitteleinfärbung oder in Arzneimittelüberzügen sowie zur Herstellung von Pigmentpräparationen und Trockenpräparaten.
Cadystin a and b, major unit peptides comprising cadmium binding peptides induced in a fission yeast ----- separation, revision of structures and synthesis