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Vesicular Tubular Clusters01:45

Vesicular Tubular Clusters

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After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
With the help of motor proteins such...
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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
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Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
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Vesicular Trasport: Endocytosis, Transcytosis and Exocytosis01:18

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Vesicular transport is a cellular process that encompasses the engulfment of particles or dissolved substances by cells. It involves endocytosis, transcytosis, and exocytosis.
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The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.
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Related Experiment Video

Updated: Feb 11, 2026

Rodent Estrous Cycle Monitoring Utilizing Vaginal Lavage: No Such Thing As a Normal Cycle
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Calcium: the common theme in vesicular cycling.

A Abenavoli1, M Montagna, A Malgaroli

  • 1Unit of Neurobiology, University San Raffaele, Via Olgettina 58, 20132 Milan, Italy.

Nature Neuroscience
|February 15, 2001
PubMed
Summary

Calcium is crucial for synaptic vesicle release, impacting both the uptake and expulsion of neurotransmitters. New methods reveal calcium

Area of Science:

  • Neuroscience
  • Cell Biology
  • Biochemistry

Background:

  • Synaptic vesicle release, a fundamental process in neuronal communication, is primarily understood to be calcium-dependent.
  • Traditional methods often intertwine the study of endocytosis (vesicle recycling) and exocytosis (neurotransmitter release).

Discussion:

  • A novel technique allows for the independent analysis of endocytosis and exocytosis.
  • This advancement reveals that calcium ions play a regulatory role in both vesicle uptake and release.
  • The findings challenge the long-held view that calcium's primary role is solely in exocytosis.

Key Insights:

  • Calcium ions modulate both the endocytic and exocytic pathways of synaptic vesicles.
  • Independent separation of endocytosis and exocytosis provides a clearer understanding of calcium's dual function.

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Outlook:

  • Future research can explore the specific molecular mechanisms by which calcium regulates endocytosis.
  • This work may lead to new therapeutic targets for neurological disorders involving synaptic dysfunction.