7666
While TGF - beta1 does not alter the mitogen - induced expression and abundance of G1 phase cyclin D1 and cdks 4 and 2 in MCs , it inhibits cyclin E - cdk 2 activity , thus preventing mitogen - elicited phosphorylation and inactivation of pRb in G1 phase and transition to S phase .
 TGF - beta1, cyclin D1, cdks 4 and 2, cyclin E, cdk 2, pRb
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 TGF - beta1, cyclin D1, cdks 4 and 2, cyclin E, cdk 2, pRb