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Yeast U1 snRNP is considerably more complex than its metazoan counterpart , which suggests possible differences between yeast and metazoa in early splicing events .
 Yeast U1 snRNP
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Yeast U1 snRNP