1479
Maximal induction of the c-fos gene was followed by that for the fos-B gene .
 DNA: c-fos gene; DNA: fos-B gene
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:
 DNA: c-fos gene; DNA: fos-B gene