3121
Binding of L - BMAA to intracellular proteins , but no clear protein incorporation was detected in response to ( 14 ) C - L - BMAA exposures .
 L - BMAA, ( 14 ) C, L - BMAA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 L - BMAA, ( 14 ) C, L - BMAA