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Investigative Ophthalmology & Visual Science, Vol 28, 658-664, Copyright © 1987 by Association for Research in Vision and Ophthalmology

ARTICLES AND REPORTS

Calcium binding protein immunoreactivity in pigeon retina

B Pasteels, M Parmentier, EM Lawson, A Verstappen and R Pochet

Pigeon retina has been mapped immunocytochemically for vitamin D- dependent calcium-binding protein (D-CaBP). Immunoreactivity was found in the cones of the yellow field, but not in photoreceptors of the red field. The D-CaBP-containing cones were a subpopulation of those in the yellow field having straight fibres leading to their synaptic terminals. D-CaBP immunoreactivity was also found in horizontal cells, the amount present varying according to position along the retina, and in some amacrine cells. Immunoblots of pigeon retinal proteins separated by SDS-polyacrylamide gel electrophoresis indicated two D- CaBP forms, having apparent molecular weights of 27000 and 29000. Both these forms of D-CaBP have been found previously in rat and pigeon brain.




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Copyright © 1987 by the Association for Research in Vision and Ophthalmology