3883
Plasmids for the cloning and expression of full - length double - stranded cDNAs under control of the SV40 early or late gene promoter .
 SV40 early, late gene
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 SV40 early, late gene