11042
Chloramphenicol acetyltransferase expression constructs containing regions of the human collagenase-1 promoter were stably or transiently transfected into U937 cells , and reporter activity was assessed at various times after the onset of phorbol 12-myristate 13-acetate (PMA)-mediated differentiation .
 protein: Chloramphenicol acetyltransferase; protein: collagenase-1; DNA: Chloramphenicol acetyltransferase expression constructs; DNA: collagenase-1 promoter; DNA: human collagenase-1 promoter; cell line: U937 cells
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: Chloramphenicol acetyltransferase, collagenase-1, Chloramphenicol acetyltransferase expression constructs, collagenase-1 promoter, human collagenase-1 promoter, U937 cells 
Answer:
 protein: Chloramphenicol acetyltransferase; protein: collagenase-1; DNA: Chloramphenicol acetyltransferase expression constructs; DNA: collagenase-1 promoter; DNA: human collagenase-1 promoter; cell line: U937 cells