Light induced shift and binding of S-antigen in retinal rods

Curr Eye Res. 1985 May;4(5):613-8. doi: 10.3109/02713688508999993.


S-antigen has been quantitated in bovine and rat retina by electroimmunoassay. The molar ratios S-antigen to rhodops in in photoreceptor cells were close to 1:1. Immunofluorescence studies show that light induces a shift of S-antigen towards the rod outer segments where it concentrates. Assays indicate that S-antigen becomes largely water insoluble but detergent soluble under these conditions. On basis of previous ultrastructural and present results, this has been interpreted as a light induced binding of S-antigen to the rod outer segment membranes. The data support evidence from literature that S-antigen interacts with (rhod) ops in and we conclude that S-antigen plays a major role in the phototransduction process.

MeSH terms

  • Adaptation, Physiological
  • Animals
  • Antigens / analysis
  • Antigens / immunology*
  • Arrestin
  • Fluorescent Antibody Technique
  • Immunoelectrophoresis
  • Light*
  • Photoreceptor Cells / immunology*
  • Rats
  • Rats, Inbred Strains
  • Staining and Labeling


  • Antigens
  • Arrestin