Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Photosystem II01:22

Photosystem II

The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across  two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
Photosystem I01:27

Photosystem I

Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
Anoxygenic Photosynthesis01:30

Anoxygenic Photosynthesis

Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green sulfur bacteria, heliobacteria, and...
Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate light...

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Modulation of O<sub>2</sub> Affinity and Enzymatic Activity of Core‒Shell Structured Hemoglobin Nanoparticles.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026
Same author

Poly(2-ethyl-2-oxazoline)-Conjugated Porcine Serum Albumin as a Veterinary Albumin Therapeutic.

ACS applied bio materials·2026
Same author

Photocurable polymer-based tubular micromotors: advancing toward life science applications.

Chemical communications (Cambridge, England)·2025
Same author

Ending publication bias: A values-based approach to surface null and negative results.

PLoS biology·2025
Same author

Nanoparticle O<sub>2</sub> Carrier Composed of a Polymerized Stroma-Free Hemoglobin Core and Serum Albumin Shell as a Red Blood Cell Alternative in Hemorrhagic Shock Therapy.

ACS applied bio materials·2025
Same author

Self-Propelled Tubular Micromotors Powered by Hydrogen Bubbles under Mild Conditions: A Major Step toward Biological Applications with Live Cells.

ACS applied bio materials·2024

相关实验视频

Updated: Jul 13, 2026

Purification of the Dendritic Filopodia-rich Fraction
11:51

Purification of the Dendritic Filopodia-rich Fraction

Published on: May 2, 2019

使用人体血清白蛋白复合-原PX的光敏化降解水为.

Teruyuki Komatsu1, Rong-Min Wang, Patricia A Zunszain

  • 1Advanced Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan. teruyuki@waseda.jp

Journal of the American Chemical Society
|December 15, 2006
PubMed
概括

这项研究探讨了用于光敏感水分裂的重组人血清白蛋白-Zn(II) -原氨酸IX复合体. 这些蛋白染料复合体表现出高效的生产,在水还原催化中表现优于有机染色体.

更多相关视频

Light-Induced Molecular Adsorption of Proteins Using the PRIMO System for Micro-Patterning to Study Cell Responses to Extracellular Matrix Proteins
09:49

Light-Induced Molecular Adsorption of Proteins Using the PRIMO System for Micro-Patterning to Study Cell Responses to Extracellular Matrix Proteins

Published on: October 11, 2019

Mechanical Separation and Protein Solubilization of the Outer and Inner Perivitelline Sublayers from Hen's Eggs
06:12

Mechanical Separation and Protein Solubilization of the Outer and Inner Perivitelline Sublayers from Hen's Eggs

Published on: January 27, 2021

相关实验视频

Last Updated: Jul 13, 2026

Purification of the Dendritic Filopodia-rich Fraction
11:51

Purification of the Dendritic Filopodia-rich Fraction

Published on: May 2, 2019

Light-Induced Molecular Adsorption of Proteins Using the PRIMO System for Micro-Patterning to Study Cell Responses to Extracellular Matrix Proteins
09:49

Light-Induced Molecular Adsorption of Proteins Using the PRIMO System for Micro-Patterning to Study Cell Responses to Extracellular Matrix Proteins

Published on: October 11, 2019

Mechanical Separation and Protein Solubilization of the Outer and Inner Perivitelline Sublayers from Hen's Eggs
06:12

Mechanical Separation and Protein Solubilization of the Outer and Inner Perivitelline Sublayers from Hen's Eggs

Published on: January 27, 2021

科学领域:

  • 生物物理化学 生物物理化学
  • 摄影化学的使用.
  • 生物有机化学 生物有机化学

背景情况:

  • 复合人血清白蛋白 (rHSA) 可以结合Zn(II) -原氨酸IX (ZnPP).
  • 蛋白染料复合物被研究为人工光合作用.
  • 了解光敏感水分裂需要详细的光物理研究.

研究的目的:

  • 描述rHSA-ZnPP复合物的光物理性质.
  • 为了评估它们在光敏化水减少到 (H2) 中的效率.
  • 为了比较它们的性能与已建立的有机染色体.

主要方法:

  • 在rHSA (野生型和突变型) 和ZnPP之间形成复杂的组合.
  • 测量光物理性质,包括三重状态寿命.
  • 光谱分析 (过渡吸收) 用于研究电子转移.
  • 用催化剂和牺牲电子供体进行H2生产的催化试验.

主要成果:

  • rHSA-ZnPP复合体表现出长寿命的三重状态 (重量为11毫秒,突变为2.5毫秒).
  • 结合ZnPP的蛋白质可以防止三重体的自我灭.
  • 通过甲基生物 (MV2+) 观察到有效的氧化火.
  • rHSA-ZnPP系统显示出比ZnTMPyP4+更高的H2光生成效率.

结论:

  • rHSA-ZnPP复合物是有效的光敏化剂,用于减少水分.
  • 蛋白质环境在稳定光敏剂和促进电子转移方面发挥着至关重要的作用.
  • 这些生物启发的系统为人工光合作用提供了有希望的替代方案.