Centrifugal analysis of undiluted packed human erythrocyte lysates. Studies of the association of glyceraldehyde-phosphate dehydrogenase with the membrane fraction.

Concentrated human erythrocyte lysates (greater than 99% initial haematocrit) were subjected to high centrifugal fields. This caused the membrane fraction to separate from the cytoplasmic portion, due to the lower density of the former. Enzyme distribution data indicated that glyceraldehyde-phosphate dehydrogenase was predominantly in the cytoplasmic fraction.