Results 41 to 50 of about 1,409,120 (251)

Heterotropic regulation and negative homotropic cooperativity

open access: yesFEBS Open Bio, EarlyView.
We identified a structural module common to some proteins that couple negative cooperativity with heterotropic regulation, two features that rarely coexist. These proteins are ring‐like and present an ordered asymmetry whereby noncontacting subunits are symmetric, and their tertiary structure differs from that of contacting subunits.
Veronica Morea   +5 more
wiley   +1 more source

Behaviour of kittiwakes during the breeding season: relationships with nest density and breeding success [PDF]

open access: yes, 2000
Activity budgets for kittiwakes at the nest site were determined for colonies on Tyneside during the pre-laying period in 1996 and for the Skomer Island colony during the pre-laying period in 1998 and for incubation and chick rearing in 1997 and 1998 ...
Nickerson, Michelle
core  

IGF2 knockout reduces but does not abolish osteosarcoma growth in vitro and in vivo

open access: yesFEBS Open Bio, EarlyView.
To test whether endogenous IGF2 promotes osteosarcoma growth, IGF2 was knocked out in Saos2 cells via CRISPR‐Cas9. KO cells showed reduced proliferation in vitro, and knockout xenografts in mice reached only ~25% of wild‐type tumor volume. Insulin‐like growth factor 2 (IGF2) is implicated in osteosarcoma, but direct functional evidence of its role is ...
Shun Yao, Marco Archetti
wiley   +1 more source

Nesting Preference, Nesting Biology and Associated Natural Enemies of Chalichadoma flavipes Spinola, 1838 (hymenoptera: Megachilidae)

open access: yesSociobiology
Bees of genus Chalichadoma is a diverse group with numerous species mainly present in the Mediterranean region. Most of these species are using mud for building their nests, while some species are cavity nesting using available holes in the nesting area.
Kariman M. Mahmoud   +4 more
doaj   +1 more source

Notes on methods and analysis of ground nests of apoid wasps (Hymenoptera, Apoidea) [PDF]

open access: yesBiodiversity Data Journal
A large portion of species of apoid wasps (Spheciformes) place their nests underground. While nesting biology and structure of nests of cavity-nesting species are often studied, searching for nests in the ground is usually interpreted as very difficult ...
Piotr Olszewski, Petr Bogusch
doaj   +3 more sources

Oldest known dinosaurian nesting site and reproductive biology of the Early Jurassic sauropodomorph Massospondylus

open access: yes, 2012
The extensive Early Jurassic continental strata of southern Africa have yielded an exceptional record of dinosaurs that includes scores of partial to complete skeletons of the sauropodomorph Massospondylus, ranging from embryos to large adults.
Reisz, Robert R.   +9 more
core   +1 more source

Understanding and Mitigating the Risk of Accelerated Biological Aging in Survivors of Cancer: A Scoping Review

open access: yesAging and Cancer, EarlyView.
Cancer treatment is associated with measurable acceleration of biological aging across epigenetic, telomere, senescence, and immune biomarkers. However, biomarker validation and interventional strategies remain limited, especially in hematologic malignancies, underscoring the need for standardized multi‐omic aging assessments and adequately powered ...
Moataz Ellithi   +3 more
wiley   +1 more source

Distribution Patterns, Nesting Ecology and Nest Characteristics of the Stingless Bees (Tetragonula pagdeni Schwarz) in West Bengal, India

open access: yesConservation
Stingless bees, particularly Tetragonula pagdeni, are vital for both ecosystems and the economy due to their pollination services and nest products. However, little is known about their nesting habits.
Ujjwal Layek, Prakash Karmakar
doaj   +1 more source

Prognostic Value of Neurofilament Light Chain and Glial Fibrillary Acidic Protein in ALD‐Related Myelopathy

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background X‐linked adrenoleukodystrophy (X‐ALD) is a neurometabolic disorder caused by pathogenic variants in ABCD1, leading to slowly progressive spinal cord disease in nearly all affected men. Sensitive biomarkers to quantify disease severity and predict progression are needed for clinical care and trial design.
Eda G. Kabak   +4 more
wiley   +1 more source

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