7890
By using PD98059 , we demonstrated that the Raf1/MEK1/ ERK1/2 pathway did not affect the DNA binding of NF-kappa B but, rather, acted at the level of transcriptional activity of NF-kappa B .
 protein: NF-kappa B; protein: ERK1/2; protein: NF-kappa B
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: NF-kappa B, ERK1/2, NF-kappa B 
Answer:
 protein: NF-kappa B; protein: ERK1/2; protein: NF-kappa B