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LEF-1 is a transcription factor that participates in the regulation of the T-cell receptor alpha (TCR alpha) enhancer by facilitating the assembly of multiple proteins into a higher order nucleoprotein complex .
 multiple proteins, nucleoprotein complex, T-cell receptor alpha (TCR alpha) enhancer, LEF-1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 multiple proteins, nucleoprotein complex, T-cell receptor alpha (TCR alpha) enhancer, LEF-1