2883
The amplified products were analyzed , by electrophoresis in nondenaturing polyacrylamide gels , for the presence of either heteroduplexes , derived from the annealing of normal and mutant DNA strands , or single - strand conformational polymorphisms ( SSCP ) , derived from the renaturation of single - stranded DNA .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 None