8118
Six tandem repeats of the P element linked to the SV40 promoter responded to phorbol 12 - myristate 13 - acetate , while that of other elements did not .
 P element, SV40 promoter
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 P element, SV40 promoter