2646
S6 was cleaved with CNBr and three internal peptides were sequenced.
 protein: CNBr; protein: S6
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: CNBr, S6 
Answer:
 protein: CNBr; protein: S6