495
In contrast , where the C7 genes are both defective ( but still partially functional ) , there may be a profound deficit of circulating C7 because there is ample C6 to produce C56 and consume the already small amount of C7 .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 None