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Most soluble proteins targeted to the peroxisomal matrix contain a C‐terminal peroxisome targeting signal type 1 (PTS1) or an N‐terminal PTS2 that is recognized by the receptors Pex5p and Pex7p, respectively. These receptors cycle between the cytosol and peroxisome and back again for multiple rounds of cargo delivery to the peroxisome. A small number of peroxisomal matrix proteins, including all six...