9272
Positive genetic selections for inhibition of cyclin / CDK function were characterized using the E . coli neo and yeast LEU2 genes .
 cyclin, CDK, E . coli neo, yeast LEU2 genes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 cyclin, CDK, E . coli neo, yeast LEU2 genes