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The present study employs RNA protection assays to analyze the transcriptional status of the HS2 enhancer in transfected recombinant chloramphenicol acetyltransferase ( CAT ) plasmids .
 DNA: transfected recombinant chloramphenicol acetyltransferase ( CAT ) plasmids; protein: CAT; protein: chloramphenicol acetyltransferase; DNA: HS2 enhancer
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: transfected recombinant chloramphenicol acetyltransferase ( CAT ) plasmids; protein: CAT; protein: chloramphenicol acetyltransferase; DNA: HS2 enhancer