1319
An acidic activation domain is located between the N-terminal conserved region of clone 18 and its zinc fingers .
 zinc fingers, clone 18, N-terminal conserved region, acidic activation domain
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:
 zinc fingers, clone 18, N-terminal conserved region, acidic activation domain