Supplementary Table 4 Sequences of the N-terminal regions of human ER-residing proteins whose arginylation-permissive residues, Asp and Glu, are not evolutionarily conserved.

Shown in red are the signal peptides that are removed by the signal peptide peptidase complex on translocation into the ER lumen. The resulting Asp and Glu residues exposed on the N-termini of mature proteins are indicated in blue.