[Cooperative binding of calcium ions by photoreceptor membranes].
Equilibrium calcium binding by photoreceptor membranes of cattle retina in 5 mM tris-HCl buffer, pH = 7.4 at 5 degrees C in concentration interval from 2 X 10(-7) M to 2 X 10(-3) M has been studied. Binding of Ca2+ was found to depend on the manner of photoreceptor membranes preparation. Cooperative effect of Ca2+ binding in concentration interval from 2 X 10(-7) M to 10(-5) M was observed.
D000818:Animals; D002118:Calcium / Q000378:metabolism*; D002417:Cattle; D002462:Cell Membrane / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010786:Photoreceptor Cells / Q000378:metabolism*; D012160:Retina / Q000378:metabolism
D002118:Calcium
Kooperativnoe sviazyvanie ionov kal'tsiia fotoretseptornymi membranami.