Shown are the relative quantities of phospholipids (DHSM: dihydrosphingomyelin, SM: sphingomyelin, PC: phosphatidylcholine, PS: phosphatidylserine, PE: phosphatidylethanolamine, Cer: ceramide, DHC: dihydroceramide and PE lyso: lysophosphatidylethanolamine) present in the cortical urea (CU, red bars), cortical alkali (CA, green bars), nuclear urea (NU, yellow bars) and nuclear alkali (NA, blue bars) human lens membranes. To access the data, click or select the words “Appendix 1.” This will initiate the download of a compressed (pdf) archive that contains the file.