9379
Here , by comparing the biochemical and spectroscopic properties of quaternary ( ISCU / NFS1 / ISD11 / FXN ) and ternary ( ISCU / NFS1 / ISD11 ) complexes , we show that FXN stabilizes the quaternary complex and controls iron entry to the complex through activation of cysteine desulfurization .
 Chemical: iron; Chemical: cysteine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: iron; Chemical: cysteine