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A theoretical pathway of transcriptional regulation of the androgen receptor (AR) gene is via a cAMP response element ( CRE ) present in its promoter region (-508 to -501).
 DNA: CRE; DNA: promoter region; DNA: androgen receptor (AR) gene; DNA: cAMP response element
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: CRE, promoter region, androgen receptor (AR) gene, cAMP response element 
Answer:
 DNA: CRE; DNA: promoter region; DNA: androgen receptor (AR) gene; DNA: cAMP response element