989
Primary structure analysis showed that the encoded protein contains three tandem zinc-finger sequences of the type Cys2-Xaa12-His2 .
 protein: tandem zinc-finger sequences; protein: zinc-finger; protein: Cys2-Xaa12-His2
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: tandem zinc-finger sequences; protein: zinc-finger; protein: Cys2-Xaa12-His2