Non-fatty acyl polyketide starter in the biosynthesis of vicenistatin, an antitumor macrolactam antibiotic
摘要:
A biosynthetic pathway of an antitumor antibiotic vicenistatin was investigated by feeding experiments of [1-C-13] and [1,2-C-13(2)]acetate, [1-C-13]propionate, [2,3,3-H-2(3)]glutamate, and D-[6,6-H-2(2)]glucose. The elongating units of the aglycon of vicenistatin are derived from standard acetate-propionate, whereas the starter unit appears to be derived from a 3-amino-2-methylpropionate equivalent through the glutamate mutase reaction. (C) 1998 Elsevier Science Ltd. All rights reserved.
Mechanism of photooxidation of glyoxal and formaldehyde in solid oxygen at 13-18 K
作者:Tai Ly Tso、Edward K. C. Lee
DOI:10.1021/j150667a005
日期:1984.11
Synthesis of Concentrated18O-Labelled Hydrogen Peroxide and of2H-,13C- and18O-Labelled Peroxyformic Acid
作者:Guido Grassi、Markus Oldani、Alfred Bauder
DOI:10.1002/hlca.19830660134
日期:1983.2.2
method is described for the preparation of concentrated solutions (50–70%) of 18O-labelled H2O2 in water. All singly 2H-, 13C- and 18O-labelled species of peroxyformicacid have been synthesized by the reaction of appropriately labelled formic acid and H2O2.
描述了一种制备18 O-标记的H 2 O 2在水中的浓缩溶液(50-70%)的方法。通过适当标记的甲酸和H 2 O 2的反应,已经合成了全部2 H-,13 C-和18 O-标记的过氧甲酸。