1014
These studies suggest that interaction of CD2 with its natural ligand , LFA-3 , may play a role in regulation of HIV expression .
 protein: CD2; protein: LFA-3
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: CD2; protein: LFA-3