16997
A detailed analysis of the RAS can be carried out in part through the study of the enzymes , named angiotensinases , involved in its cascade , whose activity is a reflection of the functionality of their peptide substrates .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None