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Enrichment of γ-glutamyltranspeptidase (γ-GT) activity in isolated brush-border membrane vesicles (BBMV). Crude homogenates of rat renal cortex and of isolated BBMV in the cortex and proximal convoluted tubules (BBMVCTX and BBMVPCT, respectively) were assayed for γ-GT activity and protein. The fold-increases in specific activity are plotted as a bar graph ± SD for 3 separate samples.
