countercurrent distribution of rat neuraminidase-treated erythrocytes , containing 59fe-labeled mature red cells of distinct age , indicates that ( a ) the electrophoretic mobilities of red cells in different cavities along the extraction train increase with increasing k , as is the case with untreated erythrocytes , and ( b ) the cell age-related differences in surface charge-associated properties are neither eliminated nor altered by the enzyme action .
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the cell