7754
Although MKK3 , MKK4 , and MKK6 all activated p38 MAPk in experimental models , only MKK3 was found to activate recombinant p38 MAPk in LPS -treated neutrophils.
 protein: MKK4; protein: p38 MAPk; protein: MKK3; protein: MKK6; protein: MKK3; protein: p38 MAPk
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: MKK4, p38 MAPk, MKK3, MKK6, MKK3, p38 MAPk 
Answer:
 protein: MKK4; protein: p38 MAPk; protein: MKK3; protein: MKK6; protein: MKK3; protein: p38 MAPk