7913
A striking feature of the recombinant H19 allele is the occurrence of a parental imprint set on the neo replacement cassette .
 recombinant H19 allele, neo replacement cassette
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 recombinant H19 allele, neo replacement cassette