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Protein Families02:47

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Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism.   Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members.   If these new proteins contain similar amino acids in key...
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Gene families consist of groups of genes proposed to have originated from a common ancestor. Typically these arise through events in which a gene or genes are mistakenly duplicated during cell division. Unlike their parent genes (which are subject to selection pressure to maintain function), these gene copies do not need to preserve their sequences and may evolve at a relatively faster rate.
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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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Related Experiment Video

Updated: Feb 10, 2026

Examining BCL-2 Family Function with Large Unilamellar Vesicles
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Common Grounds for Family Maladies.

Konrad Oexle1, Juliane Winkelmann2

  • 1Institute of Neurogenomics, Helmholtz Center Munich, Munich, Germany.

Neuron
|May 18, 2018
PubMed
Summary
This summary is machine-generated.

Common genetic variants play a larger role in familial migraine than in the general population. This finding advances our understanding of migraine genetics and disease inheritance patterns.

Keywords:
Brugada syndromeHEY2common diseasecommon variantsfamily aggregationmigrainerare disordersrare variants

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Area of Science:

  • Genetics
  • Neurology
  • Disease Etiology

Background:

  • Rare variants are known to cause Mendelian inheritance in some common diseases.
  • Common variants are increasingly recognized for their potential contribution to rare diseases.

Purpose of the Study:

  • To investigate the burden of common genetic variants in familial migraine compared to the general population.
  • To explore the genetic architecture of migraine.

Main Methods:

  • Analysis of common variant burden in familial migraine cases.
  • Comparison with migraine cases from the general population.

Main Results:

  • The study found a significantly larger burden of common variants in individuals with familial migraine.
  • This suggests a distinct genetic contribution in familial forms of the disease.

Conclusions:

  • Common variants contribute substantially to the genetic risk of familial migraine.
  • Understanding variant burden is crucial for diagnosing and treating migraine disorders.