4074
Chloramphenicol acetyltransferase ( CAT ) activities directed by 5' upstream promoter were detected preferentially in perforin-expressing cell lines .
 protein: CAT; protein: Chloramphenicol acetyltransferase; cell line: perforin-expressing cell lines; DNA: 5' upstream promoter
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: CAT, Chloramphenicol acetyltransferase, perforin-expressing cell lines, 5' upstream promoter 
Answer:
 protein: CAT; protein: Chloramphenicol acetyltransferase; cell line: perforin-expressing cell lines; DNA: 5' upstream promoter