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CBF consists of two subunits, a DNA binding subunit , CBF alpha , and a second subunit, CBF beta , that stimulates the DNA binding activity of CBF alpha .
 protein: DNA binding subunit; protein: CBF alpha; protein: CBF beta; protein: CBF alpha; protein: CBF
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: DNA binding subunit, CBF alpha, CBF beta, CBF alpha, CBF 
Answer:
 protein: DNA binding subunit; protein: CBF alpha; protein: CBF beta; protein: CBF alpha; protein: CBF