955
Furthermore , using conditioned media from U87 cells ectopically expressing each Delta 133p53 isoform , we determined that Delta 133p53 alpha and Delta 133p53 gamma but not Delta 133p53 beta , stimulate angiogenesis .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None