2215
During treatment , the phosphorylation state of Rb shifted to a hypophosphorylated form . mRNA for the HPV E6 / E7 genes decreased ; however , significant changes in the E7 protein were not observed , while increased levels of Rb immunoprecipitated with anti - E7 antibodies were observed .
 GENE: Rb; GENE: E6; GENE: E7; GENE: E7 protein; GENE: Rb; GENE: anti - E7 antibodies
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: Rb; GENE: E6; GENE: E7; GENE: E7 protein; GENE: Rb; GENE: anti - E7 antibodies