28952
Unlike any RRF characterized thus far , PfRRF2 formed dimers with disulphide interaction ( s ) and additionally localized in the cytoplasm , thus suggesting adjunct functions for the factor .
 disulphide
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 disulphide