4862
Deletion analysis revealed that the C - terminal 21 - amino acid sequence of Rev1 is uniquely required for its interaction with Rad5 and is essential for its non - catalytic function .
 Chemical: C; Chemical: amino acid
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: C; Chemical: amino acid