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Sequence comparisons strongly suggest that the S27a and the ubiquitin coding sequences found in the genome of CP Rit were both derived from a bovine mRNA encoding a hybrid protein with the structure NH2 - ubiquitin - S27a - COOH .
 GENE: S27a; GENE: ubiquitin; GENE: ubiquitin; GENE: S27a
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: S27a; GENE: ubiquitin; GENE: ubiquitin; GENE: S27a