Strong binding of cytochrome C on the envelope of spinach chloroplasts.
Yeast cationic ferricytochrome c was able to bind to the spinach (Spinacia oleracea) chloroplast envelope with a low affinity (Kd = 1.1 mum). The total amount of low affinity binding sites was of the order of 50 nmol cytochrome c mg(-1) protein. We gave the evidence that binding of ferricytochrome c to the envelope was electrostatic and that the envelope membranes were strongly negatively charged. Addition of yeast ferricytochrome c to a preparation of intact washed chloroplasts (class I) induced a strong agglutination of chloroplasts.
Neuburger
M
M
Laboratoire de Biologie Végétale, Département de Recherche Fondamentale, Centre d'Etudes Nucléaires et Université Scientifique et Médicale de Grenoble, 85 X 38041 Grenoble, France.
Joyard
J
J
Douce
R
R