8723
Strikingly , these cells contain a missense mutation of the p53 gene at codon 242 ( p53 ( 242 ) ) , which substitutes alanine for glycine .
 p53 gene, p53
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 p53 gene, p53