29938
Methionine aminopeptidases ( MetAPs ) , which remove the initiator methionine from nascent peptides , are essential in all organisms .
 Chemical: Methionine; Chemical: methionine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Methionine, methionine 
Answer:
 Chemical: Methionine; Chemical: methionine