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相关概念视频

Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

4.8K
Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
4.8K
Feedback Regulation of Calcium Concentration01:27

Feedback Regulation of Calcium Concentration

3.3K
Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
3.3K
Skeleton and Calcium Homeostasis01:21

Skeleton and Calcium Homeostasis

4.2K
Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
4.2K

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相关实验视频

Updated: May 9, 2025

Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm
15:39

Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm

Published on: February 28, 2017

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开放或关闭:pH值调节和化由类植物.

Daniel François1,2, Gert-Jan Reichart1,2, Lennart J de Nooijer1

  • 1Department of Ocean Systems, NIOZ Royal Netherlands Institute for Sea Research and Utrecht University, Texel, Netherlands.

Science advances
|May 2, 2025
PubMed
概括

海洋化生物的海洋化生物.

科学领域:

  • 海洋生物学 海洋生物学
  • 生物地质化学生物地质化学
  • 地质化学 地质化学

背景情况:

  • 海洋化生物通过生物控制或与海水处于平衡状态下沉.
  • 贝中的元素特征,如Mg/Ca比率,在物种之间有很大差异.
  • 了解控制贝组成的机制对于古海洋学和海洋生态学至关重要.

研究的目的:

  • 研究海洋化生物体中离子运输,生物控制和贝元素特征之间的关系.
  • 阐明跨膜载体和线粒体在调节化中的作用.
  • 为了解释类型特定的元素签名在甲.

主要方法:

  • 在海洋生物中对"封闭"和"开放"化系统进行比较分析.
  • 研究离子流 (H+,Ca2+) 和它们与化速率的关系.
  • 在化部位的线粒体的定位和密度分析.

主要成果:

  • 海洋化存在于从"封闭"到"开放"系统的频谱中.
  • 封闭系统呈现高离子流,导致Mg/Ca稀释和低Mg/Ca酸盐.
  • 开放的系统显示较低的离子流和较高的海水交换,导致高的Mg/Ca.
  • 线粒体密度与化场所的离子速率相关.

更多相关视频

Measuring Photophysiology of Attached Stage of Colacium sp. by a Cuvette-Type Fast Repetition Rate Fluorometer
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Measuring Photophysiology of Attached Stage of Colacium sp. by a Cuvette-Type Fast Repetition Rate Fluorometer

Published on: November 12, 2021

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Analysis of Minerals Produced by hFOB 1.19 and Saos-2 Cells Using Transmission Electron Microscopy with Energy Dispersive X-ray Microanalysis
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Analysis of Minerals Produced by hFOB 1.19 and Saos-2 Cells Using Transmission Electron Microscopy with Energy Dispersive X-ray Microanalysis

Published on: June 24, 2018

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相关实验视频

Last Updated: May 9, 2025

Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm
15:39

Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm

Published on: February 28, 2017

7.4K
Measuring Photophysiology of Attached Stage of Colacium sp. by a Cuvette-Type Fast Repetition Rate Fluorometer
07:03

Measuring Photophysiology of Attached Stage of Colacium sp. by a Cuvette-Type Fast Repetition Rate Fluorometer

Published on: November 12, 2021

2.2K
Analysis of Minerals Produced by hFOB 1.19 and Saos-2 Cells Using Transmission Electron Microscopy with Energy Dispersive X-ray Microanalysis
14:55

Analysis of Minerals Produced by hFOB 1.19 and Saos-2 Cells Using Transmission Electron Microscopy with Energy Dispersive X-ray Microanalysis

Published on: June 24, 2018

9.1K

结论:

  • 跨膜载体和线粒体在调节化中起着至关重要的作用.
  • 系统的开放或关闭程度解释了特定物种的Mg/Ca元素特征.
  • 这些发现为了解生物矿物化及其环境影响提供了一个框架.