Results 31 to 40 of about 989,351 (309)

LARP7 suppresses P-TEFb activity to inhibit breast cancer progression and metastasis. [PDF]

open access: yes, 2014
Transcriptional elongation by RNA polymerase (Pol) II is essential for gene expression during cell growth and differentiation. The positive transcription elongation factor b (P-TEFb) stimulates transcriptional elongation by phosphorylating Pol II and ...
Ji, Xiaodan   +3 more
core   +3 more sources

A novel ligand for CD44 is serglycin, a hematopoietic cell lineage-specific proteoglycan. [PDF]

open access: yes
This research was originally published in The Journal of Biological Chemistry. Noriko Toyama-Sorimachi, Hiroyuki Sorimachi, Yoshimi Tobita, Fujiko Kitamura, Hideo Yagita, Koichi Suzuki and Masayuki Miyasaka.
ソリマチ, ノリコ, 反町, 典子
core   +1 more source

Specific lid-base contacts in the 26s proteasome control the conformational switching required for substrate degradation. [PDF]

open access: yes, 2019
The 26S proteasome is essential for proteostasis and the regulation of vital processes through ATP-dependent degradation of ubiquitinated substrates. To accomplish the multi-step degradation process, the proteasomes regulatory particle, consisting of lid
Aufderheide   +42 more
core   +1 more source

Identification of PLXDC1 and PLXDC2 as the transmembrane receptors for the multifunctional factor PEDF. [PDF]

open access: yes, 2014
Pigment Epithelium Derived Factor (PEDF) is a secreted factor that has broad biological activities. It was first identified as a neurotrophic factor and later as the most potent natural antiangiogenic factor, a stem cell niche factor, and an inhibitor of
Al-Ubaidi, Muayyad   +7 more
core   +1 more source

An unfolded protein-induced conformational switch activates mammalian IRE1. [PDF]

open access: yes, 2017
The unfolded protein response (UPR) adjusts the cell's protein folding capacity in the endoplasmic reticulum (ER) according to need. IRE1 is the most conserved UPR sensor in eukaryotic cells.
Acosta-Alvear, Diego   +5 more
core   +3 more sources

Las ideas del alumnado sobre el concepto de célula al finalizar la Educación General Básica [PDF]

open access: yes, 1993
This work presents research on children's ideas conceming cells. The concept of the cell is studied from 13 years onwards and is developed in many biology textbooks at this level. The autor's hypothesis is that the concept of the cell is very complex and
Caballer Senabre, Mª J., Giménez, I.
core   +2 more sources

Adjunctive Therapeutic Plasma Exchange in Refractory Adult‐Onset Still's Disease Complicated by Secondary Macrophage Activation Syndrome: A Single‐Center Experience

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Adult‐onset Still's disease (AOSD) complicated by macrophage activation syndrome (MAS) carries substantial mortality. The role of therapeutic plasma exchange (TPE) remains uncertain. Methods We retrospectively analyzed patients with AOSD‐MAS treated with TPE at a single‐center.
Masataka Ueda   +15 more
wiley   +1 more source

Robust model-based analysis of single-particle tracking experiments with Spot-On. [PDF]

open access: yes, 2018
Single-particle tracking (SPT) has become an important method to bridge biochemistry and cell biology since it allows direct observation of protein binding and diffusion dynamics in live cells.
Darzacq, Xavier   +5 more
core   +2 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

open access: yesFEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin   +2 more
wiley   +1 more source

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