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. 1997 May 5;137(3):555–562. doi: 10.1083/jcb.137.3.555

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Topology of signal–anchor mutants. Insertion experiments, including those shown in Fig. 4, were quantified by densitometric scanning of fluorographs. The fraction of unglycosylated protein, i.e., with N_exo/C_cyt orientation, is presented as percent of the total of all forms. The values for constructs with polyleucine domains are plotted as a function of the number of leucines in this segment (Leu#). Corresponding constructs with the transmembrane segment of wild-type H1 are shown to the right (wt). The values represent the mean of three or more experiments with standard deviations.