19480
Our results indicate that conformational changes at cysteines near the nucleotide binding site affect the binding of both the nucleotide and DHEA to the enzyme , with the specific effects dependent on the structure of the resulting disulfide .
 Chemical: cysteines; Chemical: nucleotide; Chemical: nucleotide; Chemical: DHEA; Chemical: disulfide
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: cysteines; Chemical: nucleotide; Chemical: nucleotide; Chemical: DHEA; Chemical: disulfide