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Related Experiment Videos

Immunochemistry of phytochrome.

H V Rice1, W R Briggs

  • 1The Biological Laboratories, Harvard University, Cambridge, Massachusetts 02138.

Plant Physiology
|May 1, 1973
PubMed
Summary
This summary is machine-generated.

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Researchers developed an antibody against oat phytochrome polypeptides. This antibody recognized both red and far-red absorbing forms, indicating conserved antigenic sites across different phytochrome species and forms.

Area of Science:

  • Plant biology
  • Molecular biology
  • Immunology

Background:

  • Phytochrome is a plant photoreceptor crucial for light-mediated development.
  • Understanding phytochrome's antigenic properties is key to characterizing its structure and function.

Purpose of the Study:

  • To generate and characterize an antibody against oat phytochrome polypeptides.
  • To investigate the antigenic similarities between different phytochrome forms and species.

Main Methods:

  • Antibody production in rabbits against purified oat phytochrome.
  • Immunodiffusion and immunoelectrophoresis for antibody characterization.
  • Cross-reactivity tests with phytochrome from rye, corn, and pea.
  • Sucrose density gradient centrifugation and immunodiffusion with purified rye phytochrome.

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Main Results:

  • A specific antibody was elicited against oat phytochrome polypeptides, forming a single precipitin system.
  • No antigenic differences were observed between red-absorbing and far-red absorbing oat phytochrome.
  • The antibody showed cross-reactivity with rye and corn phytochrome, and partial reactivity with pea phytochrome.
  • Conserved antigenic determinants were identified in purified rye phytochrome, even after potential proteolytic modification.

Conclusions:

  • The generated antibody is specific for oat phytochrome and recognizes conserved antigenic sites.
  • Phytochrome from different plant species shares common antigenic determinants.
  • The antibody can be used to study phytochrome structure and antigenic properties across various plant types.