Results 71 to 80 of about 443,960 (348)

Horizontal distribution of marine microbial communities in the North Pacific Subtropical Front

Frontiers in Microbiology
Microbial communities are crucial for important ecosystem functions in the open ocean, such as primary production and nutrient cycling. However, few studies have addressed the distribution of microplankton communities in the remote oligotrophic region of
Eva Lopes, Eva Lopes, Miguel Semedo, Maria Paola Tomasino, Renato Mendes, Renato Mendes, João Borges de Sousa, Catarina Magalhães, Catarina Magalhães   +8 more
doaj   +1 more source

Differential Responses of Eukaryotic Phytoplankton to Nitrogenous Nutrients in the North Pacific Subtropical Gyre

Frontiers in Marine Science, 2018
Fixed inorganic nitrogen (N) is persistently scarce in the well-lit regions of the subtropical ocean gyres and its supply plays an important role in controlling phytoplankton productivity.
Yoshimi M. Rii, Yoshimi M. Rii, Robert R. Bidigare, Robert R. Bidigare, Matthew J. Church, Matthew J. Church   +5 more
doaj   +1 more source

The evolution of complex gene regulation by low specificity binding sites

, 2012
Transcription factor binding sites vary in their specificity, both within and between species. Binding specificity has a strong impact on the evolution of gene expression, because it determines how easily regulatory interactions are gained and lost ...
Plotkin, Joshua B., Stewart, Alexander J.   +1 more
core   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Functional Seasonality of Free-Living and Particle-Associated Prokaryotic Communities in the Coastal Adriatic Sea

Frontiers in Microbiology, 2020
Marine snow is an important habitat for microbes, characterized by chemical and physical properties contrasting those of the ambient water. The higher nutrient concentrations in marine snow lead to compositional differences between the ambient water and ...
Paul A. Steiner, Javier Geijo, Eduard Fadeev, Aleix Obiol, Eva Sintes, Thomas Rattei, Gerhard J. Herndl, Gerhard J. Herndl   +7 more
doaj   +1 more source

Engineering the C3N Pathway as a Short Detour for De Novo NAD⁺ Biosynthesis in Saccharomyces cerevisiae

Fermentation, 2023
As a life-essential coenzyme, nicotinamide adenine dinucleotide (NAD+) has been explored for more than a century. In Saccharomyces, the natural NAD+de novo biosynthetic pathway initiating from tryptophan has been well elucidated.
Xinli Li, Yue Tang, Yong Ding, Pengwei Li, Yihua Chen   +4 more
doaj   +1 more source

Variation in recombination frequency and distribution across eukaryotes: patterns and processes

Philosophical Transactions of the Royal Society B: Biological Sciences, 2017
Recombination, the exchange of DNA between maternal and paternal chromosomes during meiosis, is an essential feature of sexual reproduction in nearly all multicellular organisms.
J. Stapley, P. Feulner, S. Johnston, A. Santure, C. Smadja   +4 more
semanticscholar   +1 more source

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 more
wiley   +1 more source

Alternative splicing in the RBMXL1 5′-UTR induces uORF-mediated translation control in activated B lymphocytes

Scientific Reports
The RNA binding motif X-linked (RBMX) gene plays multiple roles in gene transcription and alternative splicing regulation. Modifications to its expression have been associated with the development of various cancers.
Sylvain de Breyne, Hélène Polvèche, Didier Auboeuf, Théophile Ohlmann, Henri Gruffat, Evelyne Manet   +5 more
doaj   +1 more source

Trypanosoma cruzi expresses a plant-like ascorbate-dependent hemoperoxidase localized to the endoplasmic reticulum.

, 2002
In most aerobic organisms hemoperoxidases play a major role in H(2)O(2)-detoxification, but trypanosomatids have been reported to lack this activity.
Kelly, John M, Mauricio, Isabel L, Obado, Samson O, Wilkinson, Shane R   +3 more
core   +2 more sources