Results 71 to 80 of about 7,557 (234)

Photocarcinogenesis of the skin: Current status and future trends

The Kaohsiung Journal of Medical Sciences, Volume 41, Issue 4, April 2025.
Abstract Solar radiation is essential for life on Earth but is also a major contributor to skin carcinogenesis. Solar radiation, particularly ultraviolet (UV) B (280–320 nm) and UVA (320–400 nm), induces photocarcinogenesis via various pathways. UV light can directly cause DNA damage, resulting in genetic mutations if not repaired correctly.
Ting‐Ting Yang, Cheng‐Che E. Lan
wiley   +1 more source

Metal ion coordination in the E. coli Nudix hydrolase dihydroneopterin triphosphate pyrophosphatase: New clues into catalytic mechanism. [PDF]

PLoS ONE, 2017
Dihydroneopterin triphosphate pyrophosphatase (DHNTPase), a member of the Mg2+ dependent Nudix hydrolase superfamily, is the recently-discovered enzyme that functions in the second step of the pterin branch of the folate biosynthetic pathway in E.
Shannon E Hill, Elaine Nguyen, Chiamaka U Ukachukwu, Dana M Freeman, Stephen Quirk, Raquel L Lieberman   +5 more
doaj   +1 more source

Dual‐Cys bacteriophytochromes: intermediates in cyanobacterial phytochrome evolution?

The FEBS Journal, Volume 292, Issue 5, Page 1197-1216, March 2025.
Phytochromes, light‐induced reversible photoreceptors in plants, algae, and bacteria, have a Cys residue in either the GAF or ‘PAS‐knot’ regions for linear tetrapyrrole linkage. Newly discovered dual‐Cys bacteriophytochromes (DCBs) with Cys in both GAF and ‘PAS‐knot’ in oxygenic photosynthetic cyanobacteria are plausible intermediates in the evolution ...
Hee Wook Yang, Ji‐Young Song, Ji‐Joon Song, Young Won Kim, Nathan C. Rockwell, Woojin Kim, Hyunsoo Kim, J. Clark Lagarias, Youn‐Il Park   +8 more
wiley   +1 more source

Melanin and Neurotransmitter Signalling Genes Are Differentially Co‐Expressed in Growing Feathers of White and Rufous Barn Owls

Pigment Cell &Melanoma Research, Volume 38, Issue 2, March 2025.
The colouration of the ventral face of barn owls varies from white to rufous, depending on the MC1R (V126I) genotype. This colouration is linked to multiple fitness and behavioural traits. Genes linked to neurotransmitters and synapses are upregulated with melanin genes in a transcriptome of growing feathers from the ventral part of chicks of the ...
Anne‐Lyse Ducrest, Luis M. San‐Jose, Samuel Neuenschwander, Emanuel Schmid‐Siegert, Céline Simon, Marco Pagni, Christian Iseli, Hannes Richter, Nicolas Guex, Tristan Cumer, Emmanuel Beaudoing, Mélanie Dupasquier, Pauline Charruau, Pauline Ducouret, Ioannis Xenarios, Jérôme Goudet, Alexandre Roulin   +16 more
wiley   +1 more source

Biomimetic Pieris rapae’s Nanostructure and Its Use as a Simple Sucrose Sensor

Micromachines, 2014
Biomimetics often provides efficient ways to create a product incorporating novel properties. Here we present the replication of the Pieris rapae butterfly optical structure. This butterfly has white wings with black spots.
David Bonzon, Rodrigo Martinez-Duarte, Philippe Renaud, Marc Madou   +3 more
doaj   +1 more source

The meaning of melanin, carotenoid, and pterin pigments in the bluefin killifish, Lucania goodei

, 2015
Male bluefin killifish (Lucania goodei) exhibit extensive color variation in their fins, but the utility of this variation has not yet been determined. We collected males from multiple populations and spectrophotometrically determined the pigment types ...
Ashley M. Johnson, R. Fuller
semanticscholar   +1 more source

Gut microbiome and metabolome characteristics of patients with cholesterol gallstones suggest the preventive potential of prebiotics

iMeta, Volume 4, Issue 1, February 2025.
Alterations in gut microbial composition and fecal metabolome have been reported in patients with gallstones. The gut microbiota plays a crucial role in shaping the host's fecal metabolic profile. Specifically, metabolites of amino acids, fatty acids, and nicotinic acid may affect the synthesis, transport, or metabolism of cholesterol, thereby ...
Ye Liu, Hexin Li, Tianhan Sun, Gaoyuan Sun, Boyue Jiang, Meilan Liu, Qing Wang, Tong Li, Jianfu Cao, Li Zhao, Fei Xiao, Fangqing Zhao, Hongyuan Cui   +12 more
wiley   +1 more source

QT-AIM analysis of neutral pterin and its anionic and cationic forms

Pteridines, 2014
Quantum theory of atoms in molecules (QT-AIM) allows detailed insight into the electronic structure of molecules by analysis of the gradient vector field of the electronic density distribution function.
Reibnegger Gilbert
doaj   +1 more source

Crystal structure of (2-amino-7-methyl-4-oxidopteridine-6-carboxylato-κ3O4,N5,O6)aqua(1,10-phenanthroline-κ2N,N′)zinc trihydrate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, [Zn(C8H5N5O3)(C12H8N2)(H2O)]·3H2O, a tridentate 2-amino-7-methyl-4-oxidopteridine-6-carboxylate ligand, a bidentate ancillary 1,10-phenanthroline (phen) ligand and a water molecule complete a distorted octahedral coordination ...
Siddhartha S. Baisya, Baidyanath Ghosh, Parag S. Roy   +2 more
doaj   +1 more source

Phylogenetic and Functional Diversity of Soluble Di‐Iron Monooxygenases

Environmental Microbiology, Volume 27, Issue 2, February 2025.
Relationships between monooxygenase substrates and products with respect to host cell physiology and biotechnology applications. ABSTRACT Monooxygenase (MO) enzymes are responsible for the oxidation of hydrocarbons and other compounds in the carbon and nitrogen cycles, are important for the biodegradation of pollutants and can act as biocatalysts for ...
Sui Nin Nicholas Yang, Michael A. Kertesz, Nicholas V. Coleman   +2 more
wiley   +1 more source