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Maturation of membrane function: Transport of amino acid by rat erythroid cells

The membrane changes which occur during cellular maturation of erythroid cells have been investigated. The transport of α‐aminoisobutyric acid, alanine, and N‐methylated‐α‐aminoisobutyric acid have been studied in the erythroblastic leukemic cell, the reticulocyte, and the erythrocyte of the Long‐Evans rat. The dependence of amino acid transport on extracellular sodium concentration was investigated.