1637
Regulation of cell-type-specific interleukin-2 receptor alpha-chain gene expression : potential role of physical interactions between Elf-1 , HMG-I(Y) , and NF-kappa B family proteins .
 Elf-1, interleukin-2 receptor alpha-chain, NF-kappa B family proteins, HMG-I(Y)
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:
 Elf-1, interleukin-2 receptor alpha-chain, NF-kappa B family proteins, HMG-I(Y)