892
Thus, our experiments demonstrate that the C-terminal region of HIV-1 Tat is required to suppress Mn-SOD expression and to induce pro-oxidative conditions reflected by a drop in reduced glutathione ( GSH ) and the GSH:oxidized GSH ( GSSG ) ratio .
 Tat, Mn-SOD, HIV-1 Tat, GSH, C-terminal region
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:
 Tat, Mn-SOD, HIV-1 Tat, GSH, C-terminal region