5187
This approach was used to compare the uptake of Mn ( 3 + ) Tf into neuronal cell lines with published descriptions of Fe ( 3 + ) uptake via the Tf mechanism , and to obtain quantitative information on Mn uptake via the Tf mechanism .
 Mn ( 3 + ), Fe ( 3 + ), Mn
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Mn ( 3 + ), Fe ( 3 + ), Mn