Trafficking Inside Cells Judith Riley mathematics majors are graduating 9783642096402 mathematics majors are graduating It is based on advances made in nuclear power utilization and computational methods over the past 40 years The membrane ofthese organelles is primarily synthesized and assembled at the ER but with contributions from mitochondria (phosphatidylethanolamine) and the Golgi apparatus (sphingolipids) The SecretoryPathway The transport ofproteins and lipids from their site ofsynthesis at the endoplasmic reticu­ lum (ER) to the cellsurface ismediated by the secretory pathway and isan essential process in eukaryotic organisms