5151
Compared to normal lymphocytes , MOLT-4 and CEM cells exhibited an altered cell cycle regulation of thymidine kinase , a much higher intracellular activity of this enzyme , and higher thymidine kinase mRNA expression .
 protein: enzyme; RNA: thymidine kinase mRNA; protein: thymidine kinase; protein: thymidine kinase; cell type: normal lymphocytes
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: enzyme, thymidine kinase mRNA, thymidine kinase, thymidine kinase, normal lymphocytes 
Answer:
 protein: enzyme; RNA: thymidine kinase mRNA; protein: thymidine kinase; protein: thymidine kinase; cell type: normal lymphocytes