Abstract

Glutaraldehyde cross-links the proteins of myelin and mitochondria forming polymers too large to enter 10% sodium dodecyl sulphate acrylamide gels. Phospatidylethanolamine and phosphatidylserine are also cross-linked, probably to tissue proteins. The fixed fractions retain phosphatidylethanolamine and phospatidyl-serine but there is no real change in the extraction by organic solvents of the remaining phospholipids and cholesterol. Mitochondrial fractions dehydrated for electron microscopy retain more lipid phosphorus and cholesterol than myelin fractions.

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