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Related Experiment Videos

Human SP-A: genotype and single-strand conformation polymorphism analysis

L Krizkova1, R Sakthivel, S A Olowe

  • 1Department of Cellular and Molecular Physiology, Pennsylvania State University College of Medicine, Hershey 17033.

The American Journal of Physiology
|May 1, 1994
PubMed
Summary
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The 6A/6A genotype of surfactant protein A (SP-A) is more common in Nigerians than Caucasians. This genetic variation in SP-A

Area of Science:

  • Genetics
  • Molecular Biology
  • Pulmonary Medicine

Background:

  • Two surfactant protein A (SP-A) cDNAs (1A and 6A) and an allele (6A1) were previously identified.
  • Significant heterogeneity exists in the 3' untranslated region (3'UT) of these SP-A sequences.

Purpose of the Study:

  • To investigate the frequency of the 6A/6A genotype in Caucasian and Nigerian populations.
  • To assess the meiotic stability of 3'UT heterogeneity in SP-A.

Main Methods:

  • Slot-blot analysis.
  • Allele-specific oligonucleotide probes.
  • Single-strand conformation polymorphism (SSCP) analysis.

Main Results:

  • The 6A/6A genotype was confirmed to be more frequent in the Nigerian population compared to Caucasians.

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  • 3'UT sequence variants, identified by SSCP, demonstrated stable inheritance within a three-generation family.

    • Conclusions:

    • The observed differences in 6A/6A genotype frequency suggest population-specific genetic variations.
    • The stable inheritance of 3'UT polymorphisms indicates they are natural and heritable genetic traits.