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Formamidine as an Easy-On and Easy-Off Linker for Reversible Crosslinking of Two Alkyl Amines in Peptide Stapling and Conjugation.
Angew Chem Int Ed Engl
January 2025
State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.
Amino groups are abundant in both natural and synthetic molecules, offering highly accessible sites for modifying native biorelevant molecules. Despite significant progress with more reactive thiol groups, methods for ligating two amino groups with reversible linkers for bioconjugation applications remain elusive. Herein, we report the use of oxidative decarboxylative condensation of glyoxylic acid to crosslink or ligate two alkyl amines via a compact formamidine linkage, applicable in both intra- and intermolecular contexts.
View Article and Find Full Text PDFThe Nitrogen Preference of Cactus Pear (): A Sand Culture Snapshot.
Plants (Basel)
December 2024
Department of Biochemistry and Molecular Biology, University of Nevada, Reno, NV 89557, USA.
Cactus pear ( (L.) Mill.) is an important agricultural crassulacean acid metabolism (CAM) species used as a source of food, forage, fodder, and secondary products and as a biofuel feedstock.
View Article and Find Full Text PDFDiabetic Glycation of Human Serum Albumin Affects Its Immunogenicity.
Biomolecules
November 2024
Department of Cell Biology and Immunology, Wageningen University and Research Centre, 6700 AH Wageningen, The Netherlands.
Advanced glycation end-products (AGEs) are products of a non-enzymatic reaction between amino acids and reducing sugars. Glycated human serum albumin (HSA) increases in diabetics as a consequence of elevated blood glucose levels and glycating metabolites like methylglyoxal (MGO). The impact of different types of glycation on the immunomodulatory properties of HSA is poorly understood and is studied here.
View Article and Find Full Text PDFNitrate-Photolysis Shortens the Lifetimes of Brown Carbon Tracers from Biomass Burning.
Environ Sci Technol
January 2025
State Ecology and Environment Scientific Observation and Research Station for the Yangtze River Delta at Dianshan Lake, Shanghai Environmental Monitoring Center, Shanghai 200030, China.
Biomass burning is an important source of brown carbon (BrC) aerosols, which influence climate by affecting the Earth's radiative balance. However, the transformation pathways of BrC chromophores, especially in the presence of photochemically active species, such as nitrate, are not well understood. In this study, the nitrate-mediated aqueous-phase photooxidation of three typical BrC chromophores from biomass burning was investigated, including 4-nitrocatechol, 3-nitrosalicylic acid, and 3,4-dinitrophenol.
View Article and Find Full Text PDFIntroduction: The gut microbiome, allegedly involved in both healthy homeostasis and development of disease, is found to be associated with several types of cancer. Short chain fatty acids (SCFAs), important metabolites derived from the gut microbiota, are described to carry both protective and promoting features in cancer development. Limited research exists on neuroendocrine tumors (NET) and their association with microbiota derived SCFAs.
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