Biosynthetic incorporation of advanced precursors into dehydrocurvularin, a polyketide phytotoxin from Alternaria cinerariae
作者:Yaoquan Liu、Zhe Li、John C. Vederas
DOI:10.1016/s0040-4020(98)01003-5
日期:1998.12
Biosynthesis of the polyketide, dehydrocurvularin 1, by Alternaria cinerariae was examined by incorporation experiments with N-acetylcysteamine (NAC) thiolesters of potential labeled di-, tri-, tetra-, and pentaketide assembly intermediates, 5–10. The results show that diketide and α,β-unsaturated tetraketide precursors can be utilized intact, whereas a saturated tetraketide can not, thereby suggesting
STABLE ISOTOPE-LABELED ALIPHATIC AMINO ACIDS, METHOD FOR INCORPORATING THE SAME IN TARGET PROTEIN AND METHOD FOR NMR-STRUCTURAL ANALYSIS OF PROTEINS
申请人:Kainosho Masatsune
公开号:US20090075388A1
公开(公告)日:2009-03-19
The present invention herein provides a combination of stable isotope-labeled aliphatic amino acids, which permits the structural analysis of a high molecular weight protein, in particular, a high molecular weight protein whose molecular weight exceeds 60 kDa. This is a combination of stable isotope-labeled amino acids which is characterized in that arginine (Arg), glutamine (Gln), glutamic acid (Glu), lysine (Lys), methionine (Met) and proline (Pro) satisfy the following requirements concerning the labelling pattern:
(b) one of the methylene hydrogen atoms of at least one of the methylene groups is deuterated and the both of the two methylene hydrogen atoms of at least one of the methylene groups are likewise deuterated; and
(d) when they each have a methyl group, the hydrogen atoms of the methyl group except for one of the same are deuterated, or the methyl group is completely deuterated.
US8022173B2
申请人:——
公开号:US8022173B2
公开(公告)日:2011-09-20
Specific Isotope Enrichment of Methyl Methacrylate
作者:Thekla M. Werkhoven、Reinier van Nispen、Johan Lugtenburg
A synthetic scheme has been developed to prepare methylmethacrylate specifically 13C-labelled at all different positions and in any combination of positions, from simple, commercially available starting materials. According to this scheme methyl (1-13C)- and methyl (2-13C)methacrylate (1a and 1b) have been prepared with high label incorporation (99%).