2184
In order to test the effect of this substitution , an in vitro mutagenized cDNA construct was introduced into a mammalian expression vector and transfected into monkey Cos - 1 cells separately or along with a beta - cDNA expression vector .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 None