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Sequence logos of identified N-termini with different modification states of plastid and mitochondrial proteins. “Dif” indicates the position difference upstream of a predicted plastid or mitochondrial transit peptide cleavage site. Transit peptide cleavage sites were predicted with TargetP2.0. The prediction data are available from Supplemental Table S4. “n” represents the total number of non-redundant sequences. Sequences were aligned at the identified N-terminal amino acid
