9596
Nevertheless , inactivation of the cyclin E - Cdk2 complex in response to mitogen starvation occurs normally in MEFs that have a homozygous deletion of the p27 gene .
 cyclin E, Cdk2, p27 gene
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 cyclin E, Cdk2, p27 gene