2197
Single strand conformational polymorphism analysis and direct sequencing of amplified exon 13 revealed a T - - > C transition at nt 1453 with the corresponding amino acid substitution W485R in the second family .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 None