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Most yeast peroxisomal matrix proteins contain a type 1C - terminal peroxisomal targeting signal ( PTS1 ) consisting of the tripeptide SKL or a conservative variant thereof .
 yeast peroxisomal matrix proteins
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 yeast peroxisomal matrix proteins