Results 91 to 100 of about 2,976,908 (302)

Allee dynamics: Growth, extinction and range expansion [PDF]

International Journal of Modern Physics C, 2017
In population biology, the Allee dynamics refer to negative growth rates below a critical population density. In this paper, we study a reaction-diffusion (RD) model of popoulation growth and dispersion in one dimension, which incorporates the Allee effect in both the growth and mortatility rates.
Bose, I, Pal, M, Karmakar, C
openaire   +3 more sources

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Patterns of Genetic Diversity in Highly Invasive Species: Cogongrass (Imperata cylindrica) Expansion in the Invaded Range of the Southern United States (US)

Plants, 2020
The spatial expansions of invasive organisms in the novel range are generally expected to follow an isolation-by-distance relationship (IBD) if the invasion is biologically driven; however, many invasions are facilitated anthropogenically.
Rima D. Lucardi, Lisa E. Wallace, Gary N. Ervin   +2 more
doaj   +1 more source

Accumulation of deleterious mutations during bacterial range expansions [PDF]

Genetics, 2016
AbstractRecent theory predicts that the fitness of pioneer populations can decline when species expand their range, due to high rates of genetic drift on wave fronts making selection less efficient at purging deleterious variants. To test these predictions, we studied the fate of mutator bacteria expanding their range for 1650 generations on agar ...
Bosshard, Lars, Dupanloup, Isabelle, Tenaillon, Olivier, Bruggmann, Rémy, Ackermann, Martin, Peischl, Stephan, Excoffier, Laurent   +6 more
openaire   +3 more sources

Paraneoplastic Lupus Nephritis in a Child With Neuroblastoma Recurrence

Pediatric Blood &Cancer, EarlyView.
Gabriele Mortari, Caterina Costagliola, Marta Nebiolo, Francesca Parisi, Martina Morini, Katia Mazzocco, Gabriele Gaggero, Stefano Volpi, Stefania Sorrentino, Virginia Livellara   +9 more
wiley   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

On the accumulation of deleterious mutations during range expansions

, 2013
We investigate the effect of spatial range expansions on the evolution of fitness when beneficial and deleterious mutations co-segregate. We perform individual-based simulations of a uniform linear habitat and complement them with analytical ...
Dupanloup, Isabelle, Excoffier, Laurent, Kirkpatrick, Mark, Peischl, Stephan   +3 more
core   +1 more source

Function‐driven design of a surrogate interleukin‐2 receptor ligand

FEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang, Zelin Cheng, Teng Li, Fulian Wang, Liangminghui Zhang, Xiuxiu He, Lili Liu, Wei Wang, Aibin Liang, Guang Yang   +9 more
wiley   +1 more source

Poleward Range Shifts of Breeding Birds in Wisconsin

Ecology and Evolution
Climate change is causing shifts in the geographic ranges of multiple species across the world. Birds are a critical taxon for observing range shifts because their high mobility allows them to track shifting climates over time and space.
Drake T. Stallworth, Nicholas M. Anich, Benjamin Zuckerberg   +2 more
doaj   +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