10720
The enzyme oxidized L - Leu with K ( m ) and a V ( Max ) of 9 . 23 mu M and 0 . 46 mu M / min respectively , and exhibited Kcat and a Kcat / K ( m ) of 1 . 8 s ( - 1 ) and 195 mM ( - 1 ) s ( - 1 ) .
 L - Leu
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 L - Leu