1894
In a mobility shift assay , only the NF-kappa B ( p50 /p50 ) homodimer was observed in a complex formed with the kappa B sequence in unstimulated SP-B21 cells.
 protein: NF-kappa B; protein: p50; DNA: kappa B sequence; protein: NF-kappa B ( p50 /p50 ) homodimer; protein: /p50
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, p50, kappa B sequence, NF-kappa B ( p50 /p50 ) homodimer, /p50 
Answer:
 protein: NF-kappa B; protein: p50; DNA: kappa B sequence; protein: NF-kappa B ( p50 /p50 ) homodimer; protein: /p50