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Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
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The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
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Cellular respiration is a fundamental metabolic process that enables organisms to generate energy from organic molecules. One of its central pathways is the tricarboxylic acid (TCA) cycle, also known as the Krebs cycle, which plays a crucial role in energy production and biosynthetic processes.Conversion of Pyruvate to Acetyl-CoAThe pyruvate generated from glycolysis undergoes oxidative decarboxylation by the pyruvate dehydrogenase complex, producing acetyl-CoA, one molecule of NADH, and one...
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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
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ER Retrieval Pathway01:45

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In the secretory pathway, vesicles transport proteins from one cellular compartment to another in forward transport to deliver the protein to its correct location. Occasionally, misfolded proteins and incorrect proteins escape their original compartments, and a retrieval pathway is used to return the escaped proteins to their original compartment.
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Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
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Related Experiment Video

Updated: Feb 15, 2026

A Robust Discovery Platform for the Identification of Novel Mediators of Melanoma Metastasis
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Pathways in melanoma development.

Tal H Erlich1, David E Fisher2,3

  • 1Department of Dermatology, Cutaneous Biology Research Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.

Giornale Italiano Di Dermatologia E Venereologia : Organo Ufficiale, Societa Italiana Di Dermatologia E Sifilografia
|January 11, 2018
PubMed
Summary
This summary is machine-generated.

Recent melanoma research reveals significant therapeutic advances due to a deeper understanding of molecular pathways. Overcoming treatment resistance remains a key focus in this evolving field.

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Area of Science:

  • Oncology
  • Dermatology
  • Molecular Biology

Background:

  • Melanoma was historically considered incurable.
  • Recent breakthroughs have transformed melanoma treatment paradigms.
  • Understanding molecular pathways is crucial for therapeutic development.

Purpose of the Study:

  • To review current advances in melanoma research.
  • To highlight the clinical relevance of these findings.
  • To identify future research directions, including overcoming treatment resistance.

Main Methods:

  • Comprehensive literature review of recent melanoma research.
  • Analysis of molecular pathways implicated in melanoma.
  • Evaluation of current and emerging therapeutic strategies.

Main Results:

  • Significant progress in melanoma therapeutics.
  • Identification of key molecular targets driving melanoma.
  • Emergence of treatment resistance as a major clinical challenge.

Conclusions:

  • Melanoma is increasingly treatable due to research advances.
  • Targeting molecular pathways offers new therapeutic avenues.
  • Addressing therapeutic resistance is critical for improving patient outcomes.