2518
Both sequence analysis and restriction fragment length polymorphism analysis revealed a high degree of sequence ( 97 % homology ) and structural similarity among members of the ART - CH family , indicating their common origin and recent penetration into chicken DNA .
 GENE: ART; GENE: CH
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: ART; GENE: CH