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Analysis of rat brain , heart , lung , liver , kidney and skeletal muscle revealed psi PKC zeta mRNA only in brain .
 GENE: psi PKC zeta mRNA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: psi PKC zeta mRNA