2098
Binding of superantigens to MHC class II molecules results in transduction of biochemical signals leading to cellular activation and gene expression .
 protein: MHC class II molecules
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: MHC class II molecules 
Answer:
 protein: MHC class II molecules