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Reactive oxygen species are involved in signal transduction pathways leading to nuclear factor kappa B ( NF-kappa B ) activation which has been implicated in the regulation of gene transcription .
 protein: NF-kappa B; protein: nuclear factor 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, nuclear factor kappa B 
Answer:
 protein: NF-kappa B; protein: nuclear factor kappa B