994
BACKGROUND : The MDM2 oncoprotein promotes p53 degradation via ubiquitin , establishing negative feedback control of p53 and consequently affecting cell cycle arrest and apoptosis .
 Anatomy: cell
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: cell