1356
The Cdk2 - cyclin - D1 complex did not phosphorylate any tested substrates , such as H1 histone , pRB , SV40 large T antigen , p53 , E2F - 1 or a preparation of nuclear proteins from HeLa cells ; in contrast , Cdk2 - cyclin - E and Cdk2 - cyclin - A phosphorylated these proteins .
 GENE: Cdk2; GENE: cyclin - D1; GENE: H1 histone; GENE: pRB; GENE: SV40 large T antigen; GENE: p53; GENE: E2F - 1; GENE: Cdk2; GENE: cyclin - E; GENE: Cdk2; GENE: cyclin - A
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: Cdk2; GENE: cyclin - D1; GENE: H1 histone; GENE: pRB; GENE: SV40 large T antigen; GENE: p53; GENE: E2F - 1; GENE: Cdk2; GENE: cyclin - E; GENE: Cdk2; GENE: cyclin - A