This article describes the protocol for the purification of photoreceptor outer segment fragments (POS) via ultracentrifugation from porcine/bovine retinae using homogenization and sucrose gradient centrifugation. This protocol allows the preparation of large stocks of POS aliquots, labeled or unlabeled, that can then be stored at -80 °C.
Parinot, C., Rieu, Q., Chatagnon, J., Finnemann, S. C., Nandrot, E. F. Large-Scale Purification of Porcine or Bovine Photoreceptor Outer Segments for Phagocytosis Assays on Retinal Pigment Epithelial Cells. J. Vis. Exp. (94), e52100, doi:10.3791/52100 (2014).