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Therefore, we investigated in situ the nuclear localization of Rel/ NF-kappa B proteins in accessory cells of the immune system by immunohistochemistry and double labeling by immunofluorescence from five normal human tonsils and five lymph nodes with follicular hyperplasia .
 protein: NF-kappa B; cell type: accessory cells; protein: Rel/ NF-kappa B proteins
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, accessory cells, Rel/ NF-kappa B proteins 
Answer:
 protein: NF-kappa B; cell type: accessory cells; protein: Rel/ NF-kappa B proteins