Results 81 to 90 of about 5,391,787 (331)

Biosynthesis-Assisted Structural Elucidation of the Bartolosides, Chlorinated Aromatic Glycolipids from Cyanobacteria [PDF]

open access: yes, 2015
The isolation of the bartolosides, unprecedented cyanobacterial glycolipids featuring aliphatic chains with chlorine substituents and C-glycosyl moieties, is reported.
Balskus, Emily P.   +7 more
core   +2 more sources

Structural biology of ferritin nanocages

open access: yesFEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Phocoenamicins B and C, New Antibacterial Spirotetronates Isolated from a Marine Micromonospora sp.

open access: yesMarine Drugs, 2018
Phocoenamicins B and C (1 and 2), together with the known spirotetronate phocoenamicin (3), were isolated from cultures of Micromonospora sp. The acetone extract from a culture of this strain, isolated from marine sediments collected in the Canary ...
Mercedes Pérez-Bonilla   +7 more
doaj   +1 more source

Mechanisms of IgE‐mediated food allergy and the role of allergen‐specific B cells

open access: yesFEBS Letters, EarlyView.
Food allergy arises when allergen‐specific B cells preferentially produce immunoglobulin E (IgE) antibodies against harmless foods. This article explains the mechanisms driving IgE‐mediated reactions, highlights the central role of these B cells, and discusses how natural tolerance (NT) and oral immunotherapy (OIT) can reshape allergic immune responses.
Juan‐Felipe López   +2 more
wiley   +1 more source

Ursane Triterpenes and Norisoprenoids from Anchusa italica Retz. and Their Chemotaxonomic Significance

open access: yesPlants
A total of 31 compounds were isolated from the ethyl acetate and n-butanol fractions of Anchusa italica Retz., which contained one ursane triterpenoid, 2α,3β,19α-trihydroxy-23-formyl-urs-12-en-28,21β-olide (1), and five norisoprenoids: (2R,6R,9S)-9 ...
Linchuang Shen   +8 more
doaj   +1 more source

Pyridoacridine alkaloids from deep-water marine organisms: Structural elucidation

open access: yesBulletin of Faculty of Pharmacy Cairo University, 2016
Pyridoacridine alkaloids are unique marine nitrogenous compounds that represent a large family of alkaloids. They have been reported from different marine organisms like sponges, ascidians, anemones, prosobranch mollusk, and tunicates.
Sabrin R.M. Ibrahim, Gamal A. Mohamed
doaj   +1 more source

Di-μ-bromido-bis-[(diethyl ether-κO)(2,4,6-trimethylphenyl)magnesium] : the mesityl Grignard reagent [PDF]

open access: yes, 2013
The crystal structure of the title compound, [Mg2Br2(C9H11)2(C4H10O)2], features a centrosymmetric two-centre magnesium complex with half a mol-ecule in the asymmetric unit. The Mg atom is in a considerably distorted Br2CO coordination.
Bolte, Michael   +2 more
core   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

open access: yesFEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy   +4 more
wiley   +1 more source

Local Structural Features Elucidate Crystallization of Complex Structures

open access: yesACS Nano
38 pages, 6 figures, 80 ...
Maya M. Martirossyan   +3 more
openaire   +3 more sources

A mass spectrometry-guided genome mining approach for natural product peptidogenomics. [PDF]

open access: yes, 2011
Peptide natural products show broad biological properties and are commonly produced by orthogonal ribosomal and nonribosomal pathways in prokaryotes and eukaryotes.
Cimermancic, Peter   +8 more
core  

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