9378
In the mammalian ISC machinery , preassembly of the Fe - S cluster on the scaffold protein ( ISCU ) involves a cysteine desulfurase complex ( NFS1 / ISD11 ) and frataxin ( FXN ) , the protein deficient in Friedreich ' s ataxia .
 Chemical: Fe - S; 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: Fe - S; Chemical: cysteine