17820
While HIF - 1 alpha in hypoxia translocates to the nucleus where it transcribes the target genes including vascular endothelial growth factor ( VEGF ) mRNA , HIF - 1 alpha is degraded under normoxia , which involves its proline hydroxylation and subsequent binding to the von Hippel - Lindau protein - Elongin B - Elogin C ( VBC ) complex .
 Chemical: proline
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: proline