5770
The acylase I - catalyzed deacetylation of a range of S - alkyl - N - acetyl - L - cysteines , their carbon and oxygen analogues , and the selenium analogue of NAM was also studied with porcine kidney acylase I .
 kidney
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 kidney