19371
Here , we report the solution structure of the C - terminal zinc - binding domain of CPEB1 ( CPEB1 - ZZ ) , which has a cross - braced zinc binding topology .
 Chemical: C; Chemical: zinc; Chemical: zinc
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: C; Chemical: zinc; Chemical: zinc