6990
In this study, we show that USF/ c-Myc up-regulates, while YY1 down-regulates the promoter activity of CXCR4 , a coreceptor for T cell-tropic HIV-1 entry .
 protein: c-Myc; protein: YY1; protein: CXCR4; protein: USF/ c-Myc
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: c-Myc, YY1, CXCR4, USF/ c-Myc 
Answer:
 protein: c-Myc; protein: YY1; protein: CXCR4; protein: USF/ c-Myc