1653
Detailed structural analysis of the first 12 cDNAs ( HZF 1-10 ) and a partial characterization of HZF 11-42 revealed that a common feature of human Kruppel-related zinc finger proteins is the presence of tandem arrays of zinc fingers ranging in number from 3 to over 20 that are preferentially located in the carboxy-terminal regions of the proteins.
 ( protein: zinc finger proteins, None) , ( protein: Kruppel-related zinc finger proteins, None) , ( DNA: HZF 11-42, None) , ( protein: zinc fingers, None) , ( protein: carboxy-terminal regions, None) , ( DNA: cDNAs, None) , ( protein: human Kruppel-related zinc finger proteins, None) , ( DNA: HZF 1-10, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: zinc finger proteins, None) , ( protein: Kruppel-related zinc finger proteins, None) , ( DNA: HZF 11-42, None) , ( protein: zinc fingers, None) , ( protein: carboxy-terminal regions, None) , ( DNA: cDNAs, None) , ( protein: human Kruppel-related zinc finger proteins, None) , ( DNA: HZF 1-10, None) 