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Promoter function of the 5' flanking region of the thromboxane receptor gene was evaluated by transfection of thromboxane receptor gene promoter/ chloramphenicol acetyltransferase ( CAT ) chimera plasmids into platelet-like K562 cells .
 protein: thromboxane receptor; DNA: thromboxane receptor gene; protein: CAT; protein: thromboxane receptor; protein: chloramphenicol acetyltransferase; DNA: thromboxane receptor gene; DNA: 5' flanking region; DNA: thromboxane receptor gene promoter/ chloramphenicol acetyltransferase ( CAT ) chimera plasmids; cell line: K562 cells
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:
 protein: thromboxane receptor; DNA: thromboxane receptor gene; protein: CAT; protein: thromboxane receptor; protein: chloramphenicol acetyltransferase; DNA: thromboxane receptor gene; DNA: 5' flanking region; DNA: thromboxane receptor gene promoter/ chloramphenicol acetyltransferase ( CAT ) chimera plasmids; cell line: K562 cells