Results 61 to 70 of about 1,927 (199)

Unraveling the active site cover of coproheme decarboxylase from Listeria monocytogenes

The FEBS Journal, EarlyView.
During heme biosynthesis in Gram‐positive bacteria, coproheme decarboxylase (ChdC) catalyzes the conversion of four‐propionate substrate coproheme to the two propionate product heme b. Its active site is universally covered by a flexible linking loop. This study identifies an important histidine residue, which stabilizes the loop in a ChdC homolog.
Nikolaus Falb, Dominik Hörtnagel, Chris Oostenbrink, Paul G. Furtmüller, Stefan Hofbauer   +4 more
wiley   +1 more source

Syntheses of isomers of protoporphyrin‐IX with permuted propionic side‐chains

, 1985
Total syntheses of hemins with permutations of the propionic side‐chains in the C and D rings (compared with protoporphyrin‐IX) are described. The products, 3, 2 and 4, are the dimethyl esters of protoporphyrins ‐I, ‐XI, and ‐XIV, respectively.
Pandey, Ravindra K., Smith, Kevin M.
core   +1 more source

Prophage Activation Triggers Extracellular Synthesis of DNA in Bacterial Biofilms via Rolling Circle Replication

Angewandte Chemie, Volume 138, Issue 41, 5 October 2026.
Shewanella oneidensis and Bacillus subtilis, both harboring prophages, reveal a novel biosynthetic route to scalable and programmable DNA superstructures in flower‐ and wire‐like shapes, respectively. Activation of prophages is achieved via 3‐hour starvation and monitored using reporter strains.
Gabriel Antonio S. Minero, Line Mørkholt Lund, Lasse Hyldgaard Klausen, Obinna Markraphael Ajunwa, Mingdong Dong, Rikke Louise Meyer, Victoria Birkedal, Kai Thormann   +7 more
wiley   +2 more sources

Spectral Transforms as a Tool to Optimize Digital Phenotyping in Biological Images

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Modern livestock breeding has mastered genotyping. Genome‐wide association studies, genomic selection, and SNP arrays enable genetic merit prediction at lower cost. However, phenotyping remains the bottleneck, as manual measurement is slow, expensive, subjective, and unable to capture spatial or temporal trait organization. Digital phenotyping
Joseane Padilha, Jose Victor Vieira Isola, Elsio Antonio Pereira de Figueiredo   +2 more
wiley   +1 more source

Hidden Strategies Beneath a Single Nucleotide: Contrasting Physiology in Lichen Photobiont Strains

Plant, Cell &Environment, EarlyView.
ABSTRACT Lichen photobionts exhibit significant physiological variability with important ecological implications. While this variability is relatively well studied at the interspecific level, it has rarely been examined at the intraspecific level. Here, we investigated the physiological responses to temperature and irradiance of two Trebouxia lynniae ...
Miguel Blázquez, David Pizarro, Ana García‐Muñoz, Raquel Pino‐Bodas, Asunción de los Ríos, Miren I. Arzac, José Ignacio García‐Plazaola, Beatriz Fernández‐Marín, Unai Artetxe, Rosa Toledo‐Gil, Fernando Vallejo, Leonardo M. Casano, Israel Pérez‐Vargas, Sergio Pérez‐Ortega, Francisco Gasulla   +14 more
wiley   +1 more source

Hydroxyaldehyde and formyl photoproducts of protoporphyrin IX formed under photodynamic diagnosis and therapy irradiation conditions

Photochemistry and Photobiology, EarlyView.
Photoproducts of the photosensitizer protoporphyrin IX (PpIX) may have diagnostic and therapeutic relevance in photodynamic diagnosis (PDD) and photodynamic therapy (PDT). These photoproducts possess fluorescence and photosensitizing properties and could serve as a complementary dosimetry index alongside photosensitizer photobleaching. The formation of
Sochi J. Ogbonna, Katsuyoshi Masuda, Hisanao Hazama   +2 more
wiley   +1 more source

The effect of photodynamic therapy in head and neck cancer: A comprehensive review of in vivo models

Photochemistry and Photobiology, EarlyView.
This review evaluates Photodynamic Therapy (PDT) in in vivo head and neck cancer models. PDT effectively generates ROS, reducing tumor growth, cell proliferation and angiogenesis while enhancing survival and immune responses. However, methodological heterogeneity highlights the urgent need for standardized dosimetric protocols to ensure reproducibility
Bibiana Padilha de Menezes da Silva, Rebeca Barros Nascimento, Giovanna Lopes Carvalho, Rebeca Boltes Cecatto, Maria Stella Moreira, Maria Fernanda Setúbal Destro Rodrigues   +5 more
wiley   +1 more source

A low‐cost handheld device for monitoring cutaneous photosensitivity

Photochemistry and Photobiology, EarlyView.
The cutaneous photosensitivity detection (CPD) device is a handheld contact‐based measurement device using 405 nm excitation and red fluorescence detection for monitoring skin phototoxicity risk after photodynamic therapy (PDT) procedures involving systemic aminolaevulinic acid (ALA) induced protoporphyrin IX (PpIX) photosensitization.
Md Asaduzzaman Rasel, Ryan Beland, Shakir Khan, Tayyaba Hasan, Jonathan P. Celli   +4 more
wiley   +1 more source

The chemistry of pyrrolic compounds. XLIV. The preparation and comparative spectroscopic study of some isomeric diformyldeuteroporphyrins

, 1980
A comparative study of the electronic and 1H n.m.r. spectra of five isomeric diformyldeuteroporphyrins has been carried out. Clear distinctions can be recognized in the electronic spectra of the diformyldeuteroporphyrins, depending on the relative ...
CJR Fookes, PS Clezy
core   +1 more source

Maternal nutrition as a key determinant of placental and developing blood–brain barrier xenobiotic protective functions

The Journal of Physiology, EarlyView.
Abstract figure legend Suboptimal maternal nutrition alters placental and developing blood–brain barrier (BBB) protective function and is associated with increased fetal brain vulnerability. In the placenta, nutritional adversity may reduce the exchange surface area and promote meta‐inflammation, compromising barrier efficiency in a model‐ and context ...
Kristin L. Connor, Nycolle I. S. Souza, Bruno G. Anjos, Stephen G. Matthews, Enrrico Bloise   +4 more
wiley   +1 more source